List of prolific inventors

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Thomas Alva Edison was widely known as the America's most prolific inventor, even after his death in 1931.[1][2] He held a total of 1,093 U.S. patents (1,084 utility patents and 9 design patents).[3] In 2003, he was passed by Japanese inventor Shunpei Yamazaki.[4] On February 26, 2008, Yamazaki was passed by Australian inventor Kia Silverbrook.[5] Yamazaki passed Silverbrook in 2017.

Inventors with 200 or more worldwide utility patents are shown in the following table. While in many cases this is the number of utility patents granted by the United States Patent and Trademark Office, it may include utility patents granted by other countries, as noted by the source references for an inventor.

Inventor # of patents Country Active Main fields of invention Ref
Shunpei Yamazaki 5273  Japan 1976-2018 Thin film transistors, Liquid crystal displays, Solar cells, Flash memory, OLED [6][4][7][8][9][10][11][12][13][14][15][16]
Kia Silverbrook 4746  Australia 1994-2018 Printing, Digital paper, Internet, Electronics, CGI, Chemical, DNA, Lab-on-a-chip, MEMS, Mechanical, VLSI [17][18][4][5][7][8][9][10][11][12][13][14][15]
Lowell L. Wood, Jr. 1774  USA 1977-2018 Various [19][20][15]
Roderick A. Hyde 1654  USA 2001-2018 Various [21][22][15]
Kangguo Cheng 1522  USA 2004-2018 Semiconductor device fabrication, Semiconductor memory, Semiconductor device [23][24]
Jun Koyama 1350  Japan 1991-2018 Thin film transistors, Liquid crystal displays, OLED [25][26]
Gurtej Sandhu 1301  India 1991-2018 Thin film processes and materials, VLSI, Semiconductor device fabrication [27][28][7][8][9][16]
Paul Lapstun 1288  Australia 2000-2018 Printing, Digital paper, Internet, Electronics, CGI, VLSI [29][30][4][9][10][11][12][13][14]
Leonard Forbes 1103  Canada 1991-2018 Semiconductor Memories, CCDs, Thin film processes and materials, VLSI [31][32][4][8][9][10][12]
Clarence T. Tegreene 1100  USA 2000-2018 Various [33][34]
Thomas Edison 1084  USA 1847(b)-1931(d) Electric power, Lighting, Batteries, Phonograph, Cement, Telegraphy, Mining [2][3][4][5][35][36]
Edward K. Y. Jung 1032  USA 1996-2018 Various [37][38][15]
Donald E. Weder 1000  USA 1976-2017 Florist supplies [39][40][4][7][8][9][16]
George Albert Lyon 993  Canada 1882(b)-1961(d) Automotive, Stainless steel products [4][41]
Shou-Shan Fan 957  China 2006-2018 Carbon nanotubes and applications of carbon nanotubes [42][43]
Jay S. Walker 950  USA 1998-2018 Gaming machines [44][45][9][14]
John F. O'Connor 949  USA 1864(b)-1938(d) Railway draft gearing [4][46]
Melvin De Groote 925  USA 1895(b)-1963(d) Chemical de-emulsifiers [2][4]
Michael J. Sullivan 903  USA 1977-2018 Golf balls [47][48]
Francis H. Richards 894  USA 1850(b)-19??(d) Mechanical, automation [2][4]
Rick Allen Hamilton II 892  USA 1999-2018 Various [49][50][15]
Ahmadreza Rofougaran 837  USA 2002-2018 Radio Frequency Integrated Circuits [51][52]
Jordin T. Kare 831  USA 1992-2018 Various [53][54]
Nathan Myhrvold 814  USA 1994-2018 Various [55][56]
Mark Malamud 788  USA 1997-2018 Various [57][58][15]
Robert W. Lord 778  USA 2003-2018 Various [59][60]
Royce A. Levien 775  USA 1997-2018 Various [61][62][15]
Warren Farnworth 772  USA 1990-2017 Semiconductor packaging [63][64][7][8][9]
William H. Eby 772  USA 1994-2018 Transgenic soybeans [65][66]
Muriel Y. Ishikawa 767  USA 2002-2018 Various [67][68][69]
Carleton Ellis 753  USA 1876(b)-1941(d) Margarine, Polyester, Anti-knock gasoline, Paint stripper [46][70]
Salman Akram 751  USA 1995-2018 Semiconductor packaging [71][72][7][8][9]
Jeyhan Karaoguz 745  USA 1996-2018 Wireless communications, Computer networks [73][74]
Hideo Ando 729  Japan 1983-2017 Optical recording [75][76][14]
George Spector 722  USA 1976-1998 Gadgets, Toys [77][78][7][8]
Austin L. Gurney 712  USA 1999-2018 Proteins, Antibodies [79][80][10][11]
Elihu Thomson 696  UK 1853(b)-1937(d) Electric power, Arc lamp, Electric motors, Lightning arrester, Arc welder [2][46]
Tetsujiro Kondo 695  Japan 1987-2018 Signal processing, Image processing [81][82]
Ali Khakifirooz 663  USA 2011-2018 Integrated Circuits, CMOS, Semiconductor device fabrication [83][84]
William I. Wood 653  USA 1981-2016 Proteins, Antibodies [85][86][10][11]
Simon R. Walmsley 651  Australia 1995-2015 Printing, Electronics, VLSI, Cryptography [87][88][13][14]
Bruce B. Doris 625  USA 1995-2018 Integrated Circuits, CMOS, DRAM, Semiconductor device fabrication [89][90]
Audrey D. Goddard 623  USA 1997-2017 Proteins, Antibodies [91][92][10][11]
Jerome Lemelson 606  USA 1923(b)-1997(d) Toys, Industrial robots, Cordless telephones, Fax machines, Videocassette recorders [93][2][16][94]
Edward J. Nowak 602  USA 1979-2018 Semiconductor device fabrication, Semiconductor memory, Semiconductor device [95][96]
Tadahiro Ohmi 597  Japan 1981-2018 Thin film processes and materials, Semiconductor device fabrication [97][98]
Kie Y Ahn 596  USA 1976-2018 Thin film processes and materials, VLSI, Semiconductor device fabrication [99][100]
Béla Barényi 595  Austria 1907(b)-1997(d) Passive safety in automobiles [101][102]
John M. Santosuosso 589  USA 2001-2018 Various [103][104]
Paul J. Godowski 579  USA 1994-2014 Proteins, Antibodies [105][106][10][11]
Eric C. Leuthardt 577  USA 2006-2018 Medical devices [107][108]
Artur Fischer 570  Germany 1976-2002 Fasteners, Construction toys [109][110][111]
Louis L. Hsu 551  USA 1988-2016 Various [112][113]
Edwin H. Land 535  USA 1909(b)-1991(d) Instant photography, Polarizing film [114][115]
Jeffrey P. Gambino 525  USA 1992-2018 MEMS, CMOS, BiCMOS, DRAM, Image Sensors, RF, Biosensors, 3D Integrated Circuits [116][117]
Devendra K. Sadana 525  India 1983-2018 Solar cells, OLED, Integrated Circuits, CMOS, DRAM, LEDs [118][119]
Henri Dreyfus 524   Switzerland 1882(b)-1944(d) Polymers, Synthetic fibers, Dyes [120][121]
Victoria Y. H. Wood 515  USA 2009-2018 Various [122][123]
Clyde C. Farmer 513  USA 18??(b)-19??(d) Railway air brakes [124][46][125]
Heinz Focke 512  Germany 1976-2013 Cigarette packaging [126][127][7]
Mark I. Gardner 511  USA 1994-2010 Consumer electronics, Energy, Computers, Semiconductors, Physics [128][129][7][8]
Ravi K. Arimilli 507  India 1992-2017 Computer architecture, Semiconductor memory, Cache coherence, Symmetric multiprocessing [130][131]
Clifford A. Pickover 504  USA 1992-2018 Various [132][133]
Louis H. Morin 503  USA 18??(b)-19??(d) Fasteners, Locks, Bobbins [134][125]
Tobin A. King 501  Australia 2000-2018 Printing, Digital paper, Mechanical [135][136]
Chih-Chao Yang 490  USA 2003-2018 Integrated Circuits [137][138]
Jack A. Mandelman 481  USA 1987-2014 Various [139][140]
James M. Hart 479  USA 1988-2018 Motor vehicle transmission [141][142]
Belgacem Haba 478  Algeria 1991-2018 Semiconductor manufacturing [143][144]
Anthony K. Stamper 474  USA 1998-2018 MEMS, CMOS, BiCMOS, Silicon-germanium [145][146]
Ronald S. Cok 474  USA 1986-2018 OLED displays; image processing [147][148]
Robert S. Langer 469  USA 1983-2018 Biotechnology, Drug delivery, Tissue engineering [149][150]
Akira Nakazawa 457  Australia 1980-2018 Printing, Mechanical [151][152]
Gregory J. Boss 453  USA 2008-2018 Various [153][154]
Eberhard Ammermann 451  Germany 1979-2015 Fungicides [155][156][16]
Thomas E. Murray 449  USA 1860(b)-1929(d) Electrical, HVAC, Wheels, Metal working, Light dimmer [157][158]
Kai-Li Jiang 445  China 2006-2018 Carbon nanotubes and applications of carbon nanotubes [159][160]
Hongyong Zhang 440  Japan 1993-2016 Thin film transistors, Liquid crystal displays [161][162]
Scott H. Wittkopp 432  USA 2001-2017 Motor vehicle transmission [163][164][14]
John L. Melanson 418  USA 1978-2018 Integrated circuits, semiconductors, mixed-signal products, signal processing, audio and voice components, hearing aids, LED lighting, and motor control [165][166]
John Hays Hammond, Jr. 417  USA 1888(b)-1965(d) Radio control, Radio communications, Torpedoes [167][168]
Hossein Eslambolchi 414  USA 1993-2018 Telecommunications, Network intelligence, information Technology, communications technology [169][170]
Lisa Seacat DeLuca 413  USA 2009-2018 Various [171][172]
Wilhelm Brandes 411  Germany 1976-2010 Fungicides [173][174]
Xuemin (Sherman) Chen 410  USA 1997-2018 Computer networks, Integrated Circuits, Signal Processing [175][176][177][178][179]
Cary L. Bates 407  USA 1994-2018 Programming tools, DBX, Memory debuggers [180][181][182]
Brian M. O'Connell 404  USA 2009-2018 Various [183][184]
Stanford R. Ovshinsky 400  USA 1922(b)-2012(d) Batteries, Solar cells, Liquid crystal displays, Hydrogen fuel cells, Computer data storage [185][186][187]
Vincent J. Zimmer 397  USA 1999-2018 Computer software and firmware [188][189]
Frederick A. Ware 390  USA 1981-2018 Chip design [190][191]
Josef Theurer 388  Austria 1976-2016 Railroad maintenance machines [192][193][16]
David V. Horak 386  USA 1992-2018 Various [194][195]
George P. Liang 378  China 1983-2017 Gas turbine cooling [196][197]
Hans-Joachim Santel 377  Germany 1986-2013 Herbicides, Pesticides, Organic chemistry [198][199][16]
Brent A. Anderson 377  USA 2001-2018 Semiconductor device fabrication, Semiconductor memory, Semiconductor device [200][201]
Wael W. Diab 376  USA 2003-2018 Computer networks [202][203]
Gisela Lorenz 374  Germany 1990-2015 Fungicides, Organic chemistry [204][205][16]
Paul W. Dent 373  USA 1984-2018 Wireless communications [206][207]
Garry R. Jackson 367  Australia 2001-2016 Printing, Mechanical [208][209]
Ruilong Xie 364  USA 2013-2018 Semiconductor device, CMOS, Semiconductor device fabrication [210][211]
George Westinghouse 361  USA 1846(b)-1914(d) Electric power, Electricity meter, Railway air brake, Steam engines [212][213][214]
Jeffrey E. Stahmann 353  USA 1994-2018 Medical devices [215][216]
William Daniel Hillis 352  USA 1986-2018 Various [217][218]
Mark W. Kroll 351  USA 1987-2018 Implantable medical devices [219][220][221]
Robert R. Schmidt 350  Germany 1971-2005 Herbicides, Fungicides, Organic chemistry [222][223]
Norman M. Berry 347  Australia 2006-2016 Printing, Mechanical [224][225]
Carl J. Radens 338  USA 1994-2018 Integrated Circuits, CMOS, DRAM, Semiconductor device fabrication [226][227]
Ajith K. Kumar 329  India 1984-2018 Electric Power, Energy Management, Rail Transportation, Mining [228][229]
Keith R. Walker 319  Saudi Arabia 2003-2018 Various [230][231]
Hanson S. Gifford III 315  USA 1986-2018 Medical devices [232][233]
Lawrence A. Clevenger 315  USA 1996-2018 Semiconductor, Cognitive, Memory, Security, Analytics [234][235]
Steven L. Teig 314  USA 1995-2018 Integrated Circuits [236][237]
Liang Liu 313  China 2005-2018 Carbon nanotubes and applications of carbon nanotubes [238][239]
Bengt Lindoff 312  Sweden 2000-2018 Wireless communications [240][241]
Pouya Hashemi 311  USA 2013-2018 Semiconductor, VLSI, CMOS logic and memory, cognitive [242][243]
Victoria Smith 308  USA 2006-2017 Proteins, Antibodies [244][245]
Daniel J. Winarski 303  USA 1982-2018 Various [246][247]
Elizabeth A. Sweeney 302  USA 2010-2018 Various [248][249]
Dean L. Kamen 301  USA 1979-2018 Battery-powered electric vehicles, Medical devices, Stirling engines, Water purification, Wheelchairs [250][251]
Victor S. Moore 300  USA 1982-2018 Various [252][253]
Robert G. LeTourneau 299  USA 1888(b)-1969(d) Earthworks (engineering), Heavy Equipment, Industrial Machinery [254][255]
Kulvir S. Bhogal 298  USA 2003-2018 Various [256][257]
Sarbajit K. Rakshit 292  India 2013-2018 Various [258][259]
William R. Tonti 291  USA 1994-2016 Integrated Circuits, CMOS, DRAM, Semiconductor device fabrication [260][261]
Zine-Eddine Boutaghou 289  Algeria 1994-2018 Hard disk drive [262][263]
Jeffrey W. Sleight 281  USA 1998-2018 Integrated Circuits, CMOS, Semiconductor device fabrication [264][265]
Adam Heller 280  Romania 1968-2018 Solar cells, Glucose meters, Lasers [266][267][268]
Brent Keeth 276  USA 1994-2018 Integrated Circuits, CMOS, DRAM [269][270]
Esmael H. Dinan 275  USA 2006-2018 Communication Networks [271][272]
Madhusudan K. Iyengar 273  India 2005-2018 Chip Cooling [273][274]
Michael A. Rothman 271  USA 2001-2018 Computer software and firmware [275][276]
Hartley Owen 267  USA 1976-2010 Fluid catalytic cracking [277][278]
Cyprian E. Uzoh 258  Nigeria 1998-2018 Semiconductor processing [279][280]
Yoshihiro Kikuchi 257  Japan 1994-2018 Video processing [281][282]
Harry (Tom) Graef 253  USA 1976-2018 Business machines, automation [283][284]
Daniel C. Edelstein 251  USA 1991-2018 Semiconductor manufacturing [285][286]
Bran Ferren 250  USA 1986-2018 Computers, Consumer Electronics, Electro-Optical Systems, Medical, User Interfaces, Automotive, Vehicles & Transportation [287][288]
Takeshi Chujoh 248  Japan 1995-2018 Video processing [289][290]
Rajiv V. Joshi 247  USA 1986-2018 Electronics, analytics [291][292]
Michael (S.) Tsirkin 247  Israel 2012-2018 Virtual Machines, I/O Data Processing, Computer Graphics, Power Management, Computer Memory, Computer Networks, Distributed Data Processing, Fault Recovery, Data Structures [293][294]
Nobuyuki Taniguchi 245  Japan 1979-2015 Cameras [295][296]
Craig E. Hampel 245  USA 1996-2018 Integrated Circuits [297][298]
Christopher J. Dawson 244  USA 2006-2018 Various [299][300]
Johnny M. Shieh 242  USA 1996-2018 Various [301][302]
Philip S. Yu 240  USA 1982-2018 Various [303][304]
Assaf Natanzon 240  Israel 2007-2018 Storage Systems, Data Protection [305][306]
Dorin Comaniciu 236  USA 2003-2018 Machine Intelligence, Medical Imaging, Image-Guided Surgery, Computer Vision [307][308]
Gerald F. McBrearty 231  USA 1997-2018 Various [309][310]
Imad Libbus 230  USA 2007-2018 Medical devices [311][312]
Thomas J. Kennedy III 228  USA 1992-2018 Sporting Goods, Wind Turbines, Biotechnology [313][314]
Louis B. Rosenberg 226  USA 1995-2018 Augmented Reality, Virtual Reality, A.I., HCI [315][316]
Mark A. Horowitz 224  USA 1993-2018 Integrated Circuits [317][318]
Zvi Or-Bach 222  USA 1982-2018 Various [319][320]
Paul Ian Mackey 220  Australia 2008-2016 Printing, Mechanical [321][322]
James R. Kraemer 219  USA 2008-2018 Various [323][324]
Sandeep R. Patil 217  India 2008-2018 Various [325][326]
James W. Seaman 216  USA 2005-2018 Various [327][328]
Gregory McAvoy 208  Ireland 2003-2017 Printing, MEMS [329][330]
Sebastian T. Ventrone 207  USA 1989-2018 Semiconductor, Logic, Architecture [331][332]
Mukta G. Farooq 206  USA 1993-2018 Semiconductor materials and structures, packaging technology, and 3-dimensional silicon integration [333][334]
Hiroshi (You) Yoshioka 205  Japan 1997-2015 Cameras [335][336]
Patrick B. Usoro 205  USA 1999-2016 Motor vehicle transmission, Hybrid Powertrains, Vehicle Thermal Management [337][338]
Seung H. Kang 205  USA 2002-2018 Semiconductor device technologies, MRAM, spintronics, and memory circuit design [339][340]
Sadeg M. Faris 202  Libya 1979-2018 Various [341][342]
Stephen G. Perlman 202  USA 1989-2018 Wireless communications, Cloud gaming, Video compression [343][344]

This table was current as of September 18, 2018. The columns are defined as follows:

  • Inventor: The name of the inventor.
  • # of patents: This is the number of utility patents that have been issued. Only utility patents (or the international equivalent) are listed, as a utility patent is a patent for an invention. Not all patents are for inventions. Other patent types include: design patents for the ornamental design of an object; plant patents for plant varieties; and reissue patents, where a correction is made to an already granted patent. This list does not include patent applications (patents pending) as there is no guarantee that a patent application actually describes a novel invention until the patent is granted.
  • Country: This is the country of birth or upbringing of the inventor, where known. If unknown, this is the country of residence identified in the inventor's patent filings.
  • Active: The first and last year in which an inventor received a patent issuance, except when activity was prior to digital records, in which case year of birth (b) and death (d) may be substituted. If an inventor's first year is 1976 or a few years after, there may be activity prior to this; earlier dates are not present in the primary source, and would require a secondary source.
  • Main fields of invention: These are the main areas that the inventor is or was active in.

Threshold for inclusion[edit]

As the average number of patents per inventor is around 3, some sources define prolific inventors as five times above the average (in terms of patents), leading to a threshold of 15 patents.[345] However, this table currently has an arbitrary cut-off limit for inclusion of 200 patents. This is purely for practical reasons – there are tens of thousands of inventors with more than 15 patents. The threshold of 200 patents means that some famous prolific inventors such as Nikola Tesla are not included in this list, as Tesla had 111 patents.[346][347]

Significance of inventions[edit]

This table is a sortable list of the most prolific inventors as measured by utility patents granted. It does not include other types of invention, such as inventions that were never applied for nor granted, for which there is no known source. Nor does the table attempt to measure the significance of an inventor and their inventions. The significance of inventions is often not apparent until many decades after the invention has been made. For recent inventors, it is not yet possible to determine their place in history.

The common symbol for inventiveness, the light bulb, is an example. The first incandescent light bulb was invented by British chemist Sir Humphry Davy in 1802. Many subsequent inventors improved Davy's invention prior to the successful commercialization of electric lighting by Thomas Edison in 1880, 78 years later. Electric lighting continued to be developed. Edison's carbon filament light bulb was made obsolete by the tungsten filament light bulb, invented in 1904 by Sándor Just and Franjo Hanaman. It is this that forms the popular conception of a light bulb, though there are other major forms of lighting. The principle of fluorescent lights was known since 1845, and various inventors, including Edison and Nikola Tesla worked on them without commercial success. Various improvements were made by many other inventors, until General Electric introduced "fluorescent lumiline lamps" commercially in 1938, first available to the public at the 1939 World's Fair. LED lamps also have a long history, with the first light-emitting diode (LED) invented in 1927 by Oleg Losev. LEDs were initially of low brightness, and have been used as indicator lamps and seven-segment displays since 1968. It wasn't until the development of high efficiency blue LEDs by Shuji Nakamura in the 1980s that white LEDs for lighting applications became practical. Although higher cost than incandescent light bulbs, LEDs have higher efficiency and longer life and may finally displace light bulbs in general lighting applications. In each case, more than 50 years passed between the initial invention and commercial success in general lighting applications.

Various published lists[edit]

Rankings of prolific inventors have been published at various times. However, until the patent records were digitized, these lists were very tedious to prepare, as many thousands of patent records had to be checked manually. Even after digitization, it is still not a simple process. While the USPTO keeps statistics for annual rankings of inventions assigned to companies, it no longer publishes rankings of individual inventors. The last such list was published by the USPTO in 1998.[16] Also, patents predating 1976 have not yet been digitized in the USPTO records. This means that patents before 1976 will not be included in a USPTO search by inventor name, and the number of patents granted before 1976 must be added to current searches.

Popular Science (1936)[edit]

In January 1936, Popular Science published a list of the "most prolific living inventors to be found in America today".[46]

Rank Inventor U.S. Patents
1 John F. O'Connor 949
2 Elihu Thomson 696
3 Carleton Ellis 648
4 Henry A. Wise Wood 434
5 John Hays Hammond Jr. 360
6 Clyde C. Farmer 344
7 Ethan I. Dodds 321
8 Edward Weston 309

Thomas Edison was not included in the list, as he died in 1931, five years earlier.

Time Magazine (2000)[edit]

On December 4, 2000, Time Magazine published a list of the "top five inventors".[2]

Rank Inventor U.S. Patents
1 Thomas Edison 1,093
2 Melvin De Groote 925
3 Francis H. Richards 894
4 Elihu Thomson 696
5 Jerome Lemelson 554

This list only included U.S. inventors, so omitted Canadian inventor George Albert Lyon, with 993 U.S. patents at the time of publication, Japanese inventor Shunpei Yamazaki, with 745 U.S. patents, and Béla Barényi, with 595 German patents. Also omitted were John F. O'Connor with 949 U.S. patents, and Carleton Ellis, with 753 U.S. patents at the time of publication.

USA Today (2005)[edit]

On December 13, 2005 USA Today published a list of "the top 10 living U.S. patent holders":[7]

Rank Inventor U.S. Patents
1 Shunpei Yamazaki 1,432
2 Donald Weder 1,322
3 Kia Silverbrook 810
4 George Spector 723
5 Gurtej Sandhu 576
6 Warren Farnworth 547
7 Salman Akram 527
8 Mark Gardner 512
9 Heinz Focke 508
10 Joseph Straeter 477

This research was performed by ipIQ of Chicago (now "The Patent Board"[348]) and 1790 Analytics[349] of New Jersey. This list only considered living inventors, and thus did not include such prolific inventors as Thomas Edison, Melvin De Groote, and Elihu Thomson. This list included design patents, which are not patents for inventions.

Condé Nast Portfolio (2007)[edit]

On October 15, 2007 Condé Nast Portfolio Magazine published a list[8] of "the world's most prolific inventors alive":

Rank Inventor U.S. Patents
1 Shunpei Yamazaki 1,811
2 Kia Silverbrook 1,646
3 Donald Weder 1,350
4 George Spector 722
5 Gurtej Sandhu 674
6 Leonard Forbes 671
7 Warren Farnworth 635
8 Salman Akram 612
9 Mark Gardner 515
10 Joseph Straeter 485

This research was performed by The Patent Board,[348] a Chicago patent research and advisory firm. As with the USA Today list, the Portfolio list only considered living inventors, and thus did not include such prolific inventors as Thomas Edison. This list also included design patents, which are not patents for inventions.

Business Insider (2011)[edit]

On 6 May 2011 Business Insider published an article titled: "The Ten Greatest Inventors In The Modern Era"[4] containing the following list:

Rank Inventor U.S. Patents
1 Kia Silverbrook 3,847
2 Shunpei Yamazaki 2,061
3 Thomas Edison 1,084
4 George Albert Lyon 993
5 Paul Lapstun 969
6 Donald Weder 951
7 John F. O'Connor 949
8 Leonard Forbes 948
9 Melvin De Groote 925
10 Francis H. Richards 894

This list included living and dead inventors, and only included granted utility patents (patents for inventions).

Strutpatent.com (2012)[edit]

Strutpatent.com publishes a list of the "Top 10 Inventors" [9] listing inventors ranked by US patents (of all types) issued since 1990:

Rank Inventor U.S. Patents
1 Kia Silverbrook 4,279
2 Shunpei Yamazaki 1,664
3 Donald Weder 1,310
4 Paul Lapstun 1,098
5 Leonard Forbes 959
6 Gurtej Sandhu 728
7 Warren Farnworth 685
8 Salman Akram 653
9 Jay Walker 644
10 Chang-Hwan Hwang 634

This list included only patents granted since 1990, and includes design patents as well as utility patents.

Annual lists (2007–2012)[edit]

Strutpatent.com publishes weekly, monthly, and annual lists of the top ten categories, inventors and assignees of US patents since 2007. These lists include all patent types, not just patents for inventions (utility patents).

The top ten inventors of US patents for 2007:[10]

Rank Inventor U.S. Patents
1 Kia Silverbrook 502
2 Audrey Goddard 232
3 William I. Wood 232
4 Austin L. Gurney 225
5 Chang-Hwan Hwang 203
6 Paul J. Godowski 193
7 Shunpei Yamazaki 139
8 Paul Lapstun 129
9 Leonard Forbes 120
10 Victoria Smith 112

The top ten inventors of US patents for 2008:[11]

Rank Inventor U.S. Patents
1 Kia Silverbrook 576
2 Chang-Hwan Hwang 198
3 Audrey Goddard 168
4 Austin L. Gurney 167
5 William I. Wood 166
6 Paul J. Godowski 153
7 Shunpei Yamazaki 143
8 Paul Lapstun 137
9 Chang-Soo Lee 129
10 Victoria Smith 122

The top ten inventors of US patents for 2009:[12]

Rank Inventor U.S. Patents
1 Kia Silverbrook 444
2 Shunpei Yamazaki 137
3 Paul Lapstun 113
4 Bartley K. Andre 92
5 Daniele De Iuliis 92
6 Jonathan Ive 92
7 Matthew Rohrbach 92
8 Richard P. Howarth 91
9 Duncan Robert Kerr 91
10 Leonard Forbes 91

The top ten inventors of US patents for 2010:[13]

Rank Inventor U.S. Patents
1 Kia Silverbrook 709
2 Paul Lapstun 191
3 Shunpei Yamazaki 162
4 Simon Walmsley 115
5 Bartley K. Andre 114
6 Matthew Rohrbach 109
7 Richard P. Howarth 108
8 Jonathan Ive 108
9 Duncan Robert Kerr 108
10 Daniel J. Coster 106

The top ten inventors of US patents for 2011:[14]

Rank Inventor U.S. Patents
1 Kia Silverbrook 754
2 Paul Lapstun 268
3 Shunpei Yamazaki 163
4 Hideo Ando 162
5 You Yoshioka 153
6 Scott H. Wittkopp 126
7 James M. Hart 125
8 Edward Jung 112
9 Simon Walmsley 112
10 Jay S. Walker 99

The top ten inventors of US patents for 2012:[15]

Rank Inventor U.S. Patents
1 Kia Silverbrook 220
2 Edward Jung 180
3 Shunpei Yamazaki 172
4 Lowell Wood 169
5 Roderick Hyde 140
6 Bin Li 124
7 Royce Levien 122
8 Mark Malamud 119
9 Shunpei Yamazaki 118
10 John Rinaldo 117

This table omitted Rick Allen Hamilton II. The USPTO database shows Hamilton was an inventor or co-inventor of 128 US patents granted in 2012,[350] which would place Hamilton at 6th rank for 2012.

Differences between lists[edit]

Differences in patent numbers between the various lists are due to several reasons:

  • The lists were created on different dates. As many of the inventors in the lists are still active, the number of patents they hold are increasing.
  • While the U.S. Patent and Trademark Office (USPTO) is the primary source for U.S. patent information, only patents issued since 1976 can be electronically searched by the inventor's name at the USPTO website. For some of the listed inventors, such as Thomas Edison, all of their patents predate 1976, so other sources must be used.
  • Often entities list the worldwide total number of patents that they hold. This is not the same as the number of inventions, as a patent in one country may be for the same invention as a patent in another country. The set of patents covering a single invention in different countries is a Patent family.
  • The Time, USA Today and Portfolio lists show the total number of U.S. patents, including patents for designs (Design patents) as well as patents for inventions (Utility patents).
  • The annual lists from strutpatent.com list only those patents issued in the particular year to the inventor, not all of the inventor's patents.

See also[edit]

References[edit]

  1. ^ Thomas Alva Edison Biography at Rutgers University
  2. ^ a b c d e f g Man-Made Marvels Time Magazine, Dec 4, 2000
  3. ^ a b List of Edison patents
  4. ^ a b c d e f g h i j k l The Ten Greatest Inventors In The Modern Era Business Insider, 6 May 2011
  5. ^ a b c The True Inventor Basson-Booyens website
  6. ^ US Patents of Shunpei Yamazaki
  7. ^ a b c d e f g h i j You really can find identities of top patent holders USA Today, Dec 13, 2005
  8. ^ a b c d e f g h i j Masters of invention Portfolio, October 15, 2007
  9. ^ a b c d e f g h i j Strutpatent list of the top 10 inventors since 1990
  10. ^ a b c d e f g h i List of the top ten US patent grantees for 2007 StrutPatent.com website
  11. ^ a b c d e f g h List of the top ten US patent grantees for 2008 StrutPatent.com website
  12. ^ a b c d e List of the top ten US patent grantees for 2009 StrutPatent.com website
  13. ^ a b c d e List of the top ten US patent grantees for 2010 StrutPatent.com website
  14. ^ a b c d e f g h List of the top ten US patent grantees for 2011 StrutPatent.com website
  15. ^ a b c d e f g h i List of the top ten US patent grantees for 2012 StrutPatent.com website
  16. ^ a b c d e f g h i USPTO publication: Prolific Inventors Receiving Utility Patents 1988-1997
  17. ^ US Patents of Kia Silverbrook
  18. ^ Worldwide Patents of Kia Silverbrook
  19. ^ US Patents of Lowell L. Wood, Jr.
  20. ^ Worldwide Patents of Lowell L. Wood, Jr.
  21. ^ US Patents of Roderick A. Hyde
  22. ^ Worldwide Patents of Roderick A. Hyde
  23. ^ US Patents of Kangguo Cheng
  24. ^ Worldwide Patents of Kangguo Cheng
  25. ^ US Patents of Jun Koyama
  26. ^ Worldwide Patents of Jun Koyama
  27. ^ US Patents of Gurtej Sandhu
  28. ^ Worldwide Patents of Gurtej Sandhu
  29. ^ US Patents of Paul Lapstun
  30. ^ Worldwide Patents of Paul Lapstun
  31. ^ US Patents of Leonard Forbes
  32. ^ Worldwide Patents of Leonard Forbes
  33. ^ US Patents of Clarence T. Tegreene
  34. ^ Worldwide Patents of Clarence T. Tegreene
  35. ^ Edison's Foreign Patents
  36. ^ The Complete Thomas Alva Edison U.S. Patent Collection
  37. ^ US Patents of Edward K. Y. Jung
  38. ^ Worldwide Patents of Edward K. Y. Jung
  39. ^ US Patents of Donald E. Weder
  40. ^ Worldwide Patents of Donald E. Weder
  41. ^ Archived Boliven Patents by George Albert Lyon(s)
  42. ^ US Patents of Shou-Shan Fan
  43. ^ Worldwide Patents of Shou-Shan Fan
  44. ^ US Patents of Jay S. Walker
  45. ^ Worldwide Patents of Jay S. Walker
  46. ^ US Patents of Michael J. Sullivan
  47. ^ Worldwide Patents of Michael J. Sullivan
  48. ^ US Patents of Rick Allen Hamilton II
  49. ^ Worldwide Patents of Rick Allen Hamilton II
  50. ^ US Patents of Ahmadreza Rofougaran
  51. ^ Worldwide Patents of Ahmadreza Rofougaran
  52. ^ US Patents of Jordin T. Kare
  53. ^ Worldwide Patents of Jordin T. Kare
  54. ^ US Patents of Nathan Myhrvold
  55. ^ Worldwide Patents of Nathan Myhrvold
  56. ^ US Patents of Mark Malamud
  57. ^ Worldwide Patents of Mark Malamud
  58. ^ US Patents of Robert W. Lord
  59. ^ Worldwide Patents of Robert W. Lord
  60. ^ US Patents of Royce A. Levien
  61. ^ Worldwide Patents of Royce A. Levien
  62. ^ US Patents of Warren Farnworth
  63. ^ Worldwide Patents of Warren Farnworth
  64. ^ US Patents of William H. Eby
  65. ^ Worldwide Patents of William H. Eby
  66. ^ US Patents of Muriel Y. Ishikawa
  67. ^ Worldwide Patents of Muriel Y. Ishikawa
  68. ^ Bio of Muriel Y. Ishikawa
  69. ^ B. Zorina Khan, The Democratization of Invention: Patents and Copyrights in American Economic Development, 1790-1920 (Cambridge University Press, 2005) pp209-210
  70. ^ US Patents of Salman Akram
  71. ^ Worldwide Patents of Salman Akram
  72. ^ US Patents of Jeyhan Karaoguz
  73. ^ Worldwide Patents of Jeyhan Karaoguz
  74. ^ US Patents of Hideo Ando
  75. ^ Worldwide Patents of Hideo Ando
  76. ^ US Patents of George Spector
  77. ^ Worldwide Patents of George Spector
  78. ^ US Patents of Austin L. Gurney
  79. ^ Worldwide Patents of Austin L. Gurney
  80. ^ US Patents of Tetsujiro Kondo
  81. ^ Worldwide Patents of Tetsujiro Kondo
  82. ^ US Patents of Ali Khakifirooz
  83. ^ Worldwide Patents of Ali Khakifirooz
  84. ^ US Patents of William I. Wood
  85. ^ Worldwide Patents of William I. Wood
  86. ^ US Patents of Simon R. Walmsley
  87. ^ Worldwide Patents of Simon R. Walmsley
  88. ^ US Patents of Bruce B. Doris
  89. ^ Worldwide Patents of Bruce B. Doris
  90. ^ US Patents of Audrey D. Goddard
  91. ^ Worldwide Patents of Audrey D. Goddard
  92. ^ Worldwide Patents of Jerome Lemelson
  93. ^ The Lemelson Center for the Study of Invention & Innovation web site, Jerome Lemelson's Patents.
  94. ^ US Patents of Edward J. Nowak
  95. ^ Worldwide Patents of Edward J. Nowak
  96. ^ US Patents of Tadahiro Ohmi
  97. ^ Worldwide Patents of Tadahiro Ohmi
  98. ^ US Patents of Kie Y Ahn
  99. ^ Worldwide Patents of Kie Y Ahn
  100. ^ Worldwide Patents of Béla Barényi
  101. ^ German Patents of Béla Barényi
  102. ^ US Patents of John M. Santosuosso
  103. ^ Worldwide Patents of John M. Santosuosso
  104. ^ US Patents of Paul J. Godowski
  105. ^ Worldwide Patents of Paul J. Godowski
  106. ^ US Patents of Eric C. Leuthardt
  107. ^ Worldwide Patents of Eric C. Leuthardt
  108. ^ US Patents of Artur Fischer
  109. ^ Worldwide Patents of Artur Fischer
  110. ^ Reference to German patents of Artur Fischer
  111. ^ US Patents of Louis L. Hsu
  112. ^ Worldwide Patents of Louis L. Hsu
  113. ^ Worldwide Patents of Edwin H. Land
  114. ^ Victor K. McElheny, Insisting on the impossible: The Life of Edwin Land (Perseus Books, 1998)
  115. ^ US Patents of Jeffrey P. Gambino
  116. ^ Worldwide Patents of Jeffrey P. Gambino
  117. ^ US Patents of Devendra K. Sadana
  118. ^ Worldwide Patents of Devendra K. Sadana
  119. ^ Worldwide Patents of Henri Dreyfus
  120. ^ Camille and Henry Dreyfus Foundation
  121. ^ US Patents of Victoria Y. H. Wood
  122. ^ Worldwide Patents of Victoria Y. H. Wood
  123. ^ Worldwide Patents of Clyde C. Farmer
  124. ^ a b Archived Boliven.com website
  125. ^ US Patents of Heinz Focke
  126. ^ Worldwide Patents of Heinz Focke
  127. ^ US Patents of Mark I. Gardner
  128. ^ Worldwide Patents of Mark I. Gardner
  129. ^ US Patents of Ravi K. Arimilli
  130. ^ Worldwide Patents of Ravi K. Arimilli
  131. ^ US Patents of Clifford A. Pickover
  132. ^ Worldwide Patents of Clifford A. Pickover
  133. ^ Worldwide Patents of Louis H. Morin
  134. ^ US Patents of Tobin A. King
  135. ^ Worldwide Patents of Tobin A. King
  136. ^ US Patents of Chih-Chao Yang
  137. ^ Worldwide Patents of Chih-Chao Yang
  138. ^ US Patents of Jack A. Mandelman
  139. ^ Worldwide Patents of Jack A. Mandelman
  140. ^ US Patents of James M. Hart
  141. ^ Worldwide Patents of James M. Hart
  142. ^ US Patents of Belgacem Haba
  143. ^ Worldwide Patents of Belgacem Haba
  144. ^ US Patents of Anthony K. Stamper
  145. ^ Worldwide Patents of Anthony K. Stamper
  146. ^ US Patents of Ronald S. Cok
  147. ^ Worldwide Patents of Ronald S. Cok
  148. ^ US Patents of Robert S. Langer
  149. ^ Worldwide Patents of Robert S. Langer
  150. ^ US Patents of Akira Nakazawa
  151. ^ Worldwide Patents of Akira Nakazawa
  152. ^ US Patents of Gregory J. Boss
  153. ^ Worldwide Patents of Gregory J. Boss
  154. ^ US Patents of Eberhard Ammermann
  155. ^ Worldwide Patents of Eberhard Ammermann
  156. ^ Full patent listing for Thomas E. Murray
  157. ^ Thomas E. Murray web site
  158. ^ US Patents of Kai-Li Jiang
  159. ^ Worldwide Patents of Kai-Li Jiang
  160. ^ US Patents of Hongyong Zhang
  161. ^ Worldwide Patents of Hongyong Zhang
  162. ^ US Patents of Scott H. Wittkopp
  163. ^ Worldwide Patents of Scott H. Wittkopp
  164. ^ US Patents of John L. Melanson
  165. ^ Worldwide Patents of John L. Melanson
  166. ^ Worldwide Patents of John Hays Hammond, Jr.
  167. ^ The Infography of John Hays Hammond, Jr.
  168. ^ US Patents of Hossein Eslambolchi
  169. ^ Worldwide Patents of Hossein Eslambolchi
  170. ^ US Patents of Lisa Seacat DeLuca
  171. ^ Worldwide Patents of Lisa Seacat DeLuca
  172. ^ US Patents of Wilhelm Brandes
  173. ^ Worldwide Patents of Wilhelm Brandes
  174. ^ US Patents of Xuemin (Sherman) Chen
  175. ^ Worldwide Patents of Xuemin (Sherman) Chen
  176. ^ US Patents of Xuemin Chen a
  177. ^ US Patents of Xuemin Chen b
  178. ^ US Patents of Xuemin Chen c
  179. ^ US Patents of Cary L. Bates
  180. ^ Worldwide Patents of Cary L. Bates
  181. ^ Bio of Cary L. Bates
  182. ^ US Patents of Brian M. O'Connell
  183. ^ Worldwide Patents of Brian M. O'Connell
  184. ^ US Patents of Stanford R. Ovshinsky
  185. ^ Worldwide Patents of Stanford R. Ovshinsky
  186. ^ US Patents of Stanford Ovshinsky
  187. ^ US Patents of Vincent J. Zimmer
  188. ^ Worldwide Patents of Vincent J. Zimmer
  189. ^ US Patents of Frederick A. Ware
  190. ^ Worldwide Patents of Frederick A. Ware
  191. ^ US Patents of Josef Theurer
  192. ^ Worldwide Patents of Josef Theurer
  193. ^ US Patents of David V. Horak
  194. ^ Worldwide Patents of David V. Horak
  195. ^ US Patents of George P. Liang
  196. ^ Worldwide Patents of George P. Liang
  197. ^ US Patents of Hans-Joachim Santel
  198. ^ Worldwide Patents of Hans-Joachim Santel
  199. ^ US Patents of Brent A. Anderson
  200. ^ Worldwide Patents of Brent A. Anderson
  201. ^ US Patents of Wael W. Diab
  202. ^ Worldwide Patents of Wael W. Diab
  203. ^ US Patents of Gisela Lorenz
  204. ^ Worldwide Patents of Gisela Lorenz
  205. ^ US Patents of Paul W. Dent
  206. ^ Worldwide Patents of Paul W. Dent
  207. ^ US Patents of Garry R. Jackson
  208. ^ Worldwide Patents of Garry R. Jackson
  209. ^ US Patents of Ruilong Xie
  210. ^ Worldwide Patents of Ruilong Xie
  211. ^ George Westinghouse article at ideafinder.com
  212. ^ Hubert, P. G. (1894). Men of achievement. Inventors. New York: Charles Scribner's Sons. Page 296+
  213. ^ George Westinghouse article in Encyclopædia Britannica
  214. ^ US Patents of Jeffrey E. Stahmann
  215. ^ Worldwide Patents of Jeffrey E. Stahmann
  216. ^ US Patents of William Daniel Hillis
  217. ^ Worldwide Patents of William Daniel Hillis
  218. ^ US Patents of Mark W. Kroll
  219. ^ Worldwide Patents of Mark W. Kroll
  220. ^ Bio of Mark Kroll
  221. ^ US Patents of Robert R. Schmidt
  222. ^ Worldwide Patents of Robert R. Schmidt
  223. ^ US Patents of Norman M. Berry
  224. ^ Worldwide Patents of Norman M. Berry
  225. ^ US Patents of Carl J. Radens
  226. ^ Worldwide Patents of Carl J. Radens
  227. ^ US Patents of Ajith K. Kumar
  228. ^ Worldwide Patents of Ajith K. Kumar
  229. ^ US Patents of Keith R. Walker
  230. ^ Worldwide Patents of Keith R. Walker
  231. ^ US Patents of Hanson S. Gifford III
  232. ^ Worldwide Patents of Hanson S. Gifford III
  233. ^ US Patents of Lawrence A. Clevenger
  234. ^ Worldwide Patents of Lawrence A. Clevenger
  235. ^ US Patents of Steven L. Teig
  236. ^ Worldwide Patents of Steven L. Teig
  237. ^ US Patents of Liang Liu
  238. ^ Worldwide Patents of Liang Liu
  239. ^ US Patents of Bengt Lindoff
  240. ^ Worldwide Patents of Bengt Lindoff
  241. ^ US Patents of Pouya Hashemi
  242. ^ Worldwide Patents of Pouya Hashemi
  243. ^ US Patents of Victoria Smith
  244. ^ Worldwide Patents of Victoria Smith
  245. ^ US Patents of Daniel J. Winarski
  246. ^ Worldwide Patents of Daniel J. Winarski
  247. ^ US Patents of Elizabeth A. Sweeney
  248. ^ Worldwide Patents of Elizabeth A. Sweeney
  249. ^ US Patents of Dean L. Kamen
  250. ^ Worldwide Patents of Dean L. Kamen
  251. ^ US Patents of Victor S. Moore
  252. ^ Worldwide Patents of Victor S. Moore
  253. ^ Robert G. LeTourneau: Dean of Earthmoving
  254. ^ Texas Co-op Power: He Was a Mover and a Shaker
  255. ^ US Patents of Kulvir S. Bhogal
  256. ^ Worldwide Patents of Kulvir S. Bhogal
  257. ^ US Patents of Sarbajit K. Rakshit
  258. ^ Worldwide Patents of Sarbajit K. Rakshit
  259. ^ US Patents of William R. Tonti
  260. ^ Worldwide Patents of William R. Tonti
  261. ^ US Patents of Zine-Eddine Boutaghou
  262. ^ Worldwide Patents of Zine-Eddine Boutaghou
  263. ^ US Patents of Jeffrey W. Sleight
  264. ^ Worldwide Patents of Jeffrey W. Sleight
  265. ^ US Patents of Adam Heller
  266. ^ Worldwide Patents of Adam Heller
  267. ^ The 12 US Patents of Adam Heller prior to 1976
  268. ^ US Patents of Brent Keeth
  269. ^ Worldwide Patents of Brent Keeth
  270. ^ US Patents of Esmael H. Dinan
  271. ^ Worldwide Patents of Esmael H. Dinan
  272. ^ US Patents of Madhusudan K. Iyengar
  273. ^ Worldwide Patents of Madhusudan K. Iyengar
  274. ^ US Patents of Michael A. Rothman
  275. ^ Worldwide Patents of Michael A. Rothman
  276. ^ US Patents of Hartley Owen
  277. ^ Worldwide Patents of Hartley Owen
  278. ^ US Patents of Cyprian E. Uzoh
  279. ^ Worldwide Patents of Cyprian E. Uzoh
  280. ^ US Patents of Yoshihiro Kikuchi
  281. ^ Worldwide Patents of Yoshihiro Kikuchi
  282. ^ US Patents of Harry (Tom) Graef
  283. ^ Worldwide Patents of Harry (Tom) Graef
  284. ^ US Patents of Daniel C. Edelstein
  285. ^ Worldwide Patents of Daniel C. Edelstein
  286. ^ US Patents of Bran Ferren
  287. ^ Worldwide Patents of Bran Ferren
  288. ^ US Patents of Takeshi Chujoh
  289. ^ Worldwide Patents of Takeshi Chujoh
  290. ^ US Patents of Rajiv V. Joshi
  291. ^ Worldwide Patents of Rajiv V. Joshi
  292. ^ US Patents of Michael (S.) Tsirkin
  293. ^ Worldwide Patents of Michael (S.) Tsirkin
  294. ^ US Patents of Nobuyuki Taniguchi
  295. ^ Worldwide Patents of Nobuyuki Taniguchi
  296. ^ US Patents of Craig E. Hampel
  297. ^ Worldwide Patents of Craig E. Hampel
  298. ^ US Patents of Christopher J. Dawson
  299. ^ Worldwide Patents of Christopher J. Dawson
  300. ^ US Patents of Johnny M. Shieh
  301. ^ Worldwide Patents of Johnny M. Shieh
  302. ^ US Patents of Philip S. Yu
  303. ^ Worldwide Patents of Philip S. Yu
  304. ^ US Patents of Assaf Natanzon
  305. ^ Worldwide Patents of Assaf Natanzon
  306. ^ US Patents of Dorin Comaniciu
  307. ^ Worldwide Patents of Dorin Comaniciu
  308. ^ US Patents of Gerald F. McBrearty
  309. ^ Worldwide Patents of Gerald F. McBrearty
  310. ^ US Patents of Imad Libbus
  311. ^ Worldwide Patents of Imad Libbus
  312. ^ US Patents of Thomas J. Kennedy III
  313. ^ Worldwide Patents of Thomas J. Kennedy III
  314. ^ US Patents of Louis B. Rosenberg
  315. ^ Worldwide Patents of Louis B. Rosenberg
  316. ^ US Patents of Mark A. Horowitz
  317. ^ Worldwide Patents of Mark A. Horowitz
  318. ^ US Patents of Zvi Or-Bach
  319. ^ Worldwide Patents of Zvi Or-Bach
  320. ^ US Patents of Paul Ian Mackey
  321. ^ Worldwide Patents of Paul Ian Mackey
  322. ^ US Patents of James R. Kraemer
  323. ^ Worldwide Patents of James R. Kraemer
  324. ^ US Patents of Sandeep R. Patil
  325. ^ Worldwide Patents of Sandeep R. Patil
  326. ^ US Patents of James W. Seaman
  327. ^ Worldwide Patents of James W. Seaman
  328. ^ US Patents of Gregory McAvoy
  329. ^ Worldwide Patents of Gregory McAvoy
  330. ^ US Patents of Sebastian T. Ventrone
  331. ^ Worldwide Patents of Sebastian T. Ventrone
  332. ^ US Patents of Mukta G. Farooq
  333. ^ Worldwide Patents of Mukta G. Farooq
  334. ^ US Patents of Hiroshi (You) Yoshioka
  335. ^ Worldwide Patents of Hiroshi (You) Yoshioka
  336. ^ US Patents of Patrick B. Usoro
  337. ^ Worldwide Patents of Patrick B. Usoro
  338. ^ US Patents of Seung H. Kang
  339. ^ Worldwide Patents of Seung H. Kang
  340. ^ US Patents of Sadeg M. Faris
  341. ^ Worldwide Patents of Sadeg M. Faris
  342. ^ US Patents of Stephen G. Perlman
  343. ^ Worldwide Patents of Stephen G. Perlman
  344. ^ Prolific Inventors: Who are They and Where do They Locate? International Centre for Economic Research Working Paper No. 14/2010
  345. ^ List of Nikola Tesla patents
  346. ^ Jim Bieberich's Complete Nikola Tesla U.S. Patent Collection
  347. ^ a b The Patent Board website
  348. ^ 1790 Analytics website
  349. ^ USPTO Utility Patent Search for Rick Allen Hamilton II for 2012