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Edwin Howard Armstrong

Historical Figure

Edwin Howard Armstrong

1890–1954

American radio-frequency engineer and inventor (1890–1954)

Postwar

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Biography

Edwin Howard Armstrong was an American radio-frequency engineer and inventor who developed FM radio and the superheterodyne receiver system.

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In Their Own Words (3)

Timeline

The story of Edwin Howard Armstrong, told in moments.

1918 Event

Patented the superheterodyne receiver while serving as a Signal Corps officer in France during WWI. The technology became the basis of virtually all modern radio and television receivers.

1933 Event

Patented FM radio. It eliminated the static that plagued AM broadcasts. RCA's David Sarnoff, once his friend, spent years trying to bury the technology to protect AM radio investments.

1948 Event

Built his own FM transmitter in Alpine, New Jersey, after the FCC moved FM to a new frequency band that made all existing receivers obsolete. The regulatory battle bankrupted him.

1954 Death

Jumped from his 13th-floor apartment window in Manhattan. He was 63. His patent battles with RCA were still unresolved. His widow continued the lawsuits and won every one.

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