#2056 – 1983 20c American Inventors: Edwin Armstrong, Frequncy Modulation

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U.S. #2056
20¢ Edwin Armstrong
American Inventors
 
Issue Date: September 21, 1983
City: Washington, DC
Quantity: 48,263,750
Printed By: Bureau of Engraving and Printing
Printing Method:
Lithographed and engraved
Perforations
: 11
Color: Multicolored
 
This stamp is part of a set of four honoring some of America's top inventors. Charles Steinmetz devised methods of harnessing high voltage for the Niagara Falls Power Plant, Edwin Armstrong invented FM radio, Nikola Tesla developed the generator and other devices that made alternating current (AC) possible, and Philo T. Farnsworth invented the first television camera.
 
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U.S. #2056
20¢ Edwin Armstrong
American Inventors
 
Issue Date: September 21, 1983
City: Washington, DC
Quantity: 48,263,750
Printed By: Bureau of Engraving and Printing
Printing Method:
Lithographed and engraved
Perforations
: 11
Color: Multicolored
 
This stamp is part of a set of four honoring some of America's top inventors. Charles Steinmetz devised methods of harnessing high voltage for the Niagara Falls Power Plant, Edwin Armstrong invented FM radio, Nikola Tesla developed the generator and other devices that made alternating current (AC) possible, and Philo T. Farnsworth invented the first television camera.