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[[File:Patent for a Signal switch construction for automotive vehicles US1909040.pdf|thumb|Patented May 16, 1933 1,909,040 UNITED STATES PATENT OFFICE BORNETT L. BOBROFF, OF RACINE, WISCONSIN SIGNAL SWITCH CONSTRUCTION FOR AUTOMOTIVE VEHICLES Application filed May 10, 1930. Serial No. 451,254.|left|698x698px]] |
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[[File:Patent for a Signal switch construction for automotive vehicles US1909040.pdf|thumb|Patented May 16, 1933 1,909,040 UNITED STATES PATENT OFFICE BORNETT L. BOBROFF, OF RACINE, WISCONSIN SIGNAL SWITCH CONSTRUCTION FOR AUTOMOTIVE VEHICLES Application filed May 10, 1930. Serial No. 451,254.|left|698x698px]] |
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[[File:Patent for a Signaling device US1969116.pdf|thumb|Patented Aug. 7, 1934 1,969,116 UNITED STATES PATENT OFFICE 1,969,116 SIGNALING DEVICE Bornett L. Bobroff, Racine, Wis. Application August 8, 1929, Serial No. 384,279 2 Claims. (CI. 177-329)|left|698x698px]] |
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[[File:Patent for a Signaling device US1969116.pdf|thumb|Patented Aug. 7, 1934 1,969,116 UNITED STATES PATENT OFFICE 1,969,116 SIGNALING DEVICE Bornett L. Bobroff, Racine, Wis. Application August 8, 1929, Serial No. 384,279 2 Claims. (CI. 177-329)|left|698x698px]] |
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[[File:Patent for a Signal light for automotive vehicles US1981302.pdf|thumb|Patented Nov. 20, 1934 1,981,302 UNITED STATES PATENT OFFICE 1,981,302 SIGNAL LIGHT FOR AUTOMOTIVE VEHICLES Bornett L. Bobroff, Racine, Wis. Application August 22, 1930, Serial No. 477,072 3 Claims. (Cl. 177-329)|left|698x698px]] |
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[[File:Patent for a Signal switch construction for automotive vehicles US1984628.pdf|thumb|Patented Dec. 18, 1934 1,984,628 UNITED STATES PATENT OFFICE 1,984,628 SIGNAL SWITCH CONSTRUCTION FOR AUTOMOTIVE VEHICLES Bornett L. Bobroff, Racine, Wis. Application May 12, 1930, Serial No. 451,561 2 Claims. (Cl. 74-484)|left|698x698px]] |
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[[File:Patent for a Signal switch construction for automotive vehicles US1984628.pdf|thumb|Patented Dec. 18, 1934 1,984,628 UNITED STATES PATENT OFFICE 1,984,628 SIGNAL SWITCH CONSTRUCTION FOR AUTOMOTIVE VEHICLES Bornett L. Bobroff, Racine, Wis. Application May 12, 1930, Serial No. 451,561 2 Claims. (Cl. 74-484)|left|698x698px]] |
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[[File:Patent for a Signaling device US2005714.pdf|thumb|Patented June 18, 1935 2,005,714 UNITED STATES PATENT OFFICE 2,005,714 SIGNALING DEVICE Bornett L. Bobroff, Racine, Wis. Application August 8, 1929, Serial No. 384,319 3 Claims. (Cl. 177-329)|left|698x698px]] |
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[[File:Patent for a Signaling device US2005714.pdf|thumb|Patented June 18, 1935 2,005,714 UNITED STATES PATENT OFFICE 2,005,714 SIGNALING DEVICE Bornett L. Bobroff, Racine, Wis. Application August 8, 1929, Serial No. 384,319 3 Claims. (Cl. 177-329)|left|698x698px]] |