William Dubilier

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William Dubilier and wife cropped.jpg

William Dubilier (July 25, 1888 – July 25, 1969) was an American inventor in the field of radio and electronics. He demonstrated radio communication at Seattle's Alaska–Yukon–Pacific Exposition on June 21, 1909; ten years before the first commercial station operated.[1] A graduate of Cooper Union, he was the first to use sheets of naturally occurring mica as the dielectric in a capacitor.[2] Mica capacitors were widely used in early radio oscillator and tuning circuits because the temperature coefficient of expansion of mica was low, resulting in very stable capacitance – mica capacitors are still used where exceptional temperature stability is needed.

He founded the Dubilier Condenser Company in New York in 1920.[3]


  1. ^ Prosser, William T. (April 1912). "Wireless Telephone for Everybody". Technical World Magazine: 329–331. Retrieved 3 March 2018.
  2. ^ "William Dubilier, Inventor Dies". The Palm Beach Post Post. 27 July 1969. p. B01. Retrieved 30 July 2013. In 1955, his alma mater, Cooper Union awarded him the first Gano Dunn Medal and in 1966 awarded him its Professional Achievement Citation...
  3. ^ Blecha, Peter (7 November 2008). "William Dubilier unveils an astonishing new "wireless telephone" to fairgoers at Seattle's Alaska-Yukon-Pacific Exposition on June 21, 1909". HistoryLink.org- the Free Online Encyclopedia of Washington State History. Retrieved 30 July 2014.

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