Reginald Fessenden

Reginald Fessenden
Reginald Fessenden
	Fessenden in 1903
Born	Reginald Aubrey Fessenden; October 6, 1866; East Bolton, Canada East, Province of Canada, British North America
Died	July 22, 1932 (aged 65); Bermuda
Citizenship	Canada; United States;
Education	Trinity College School; Bishop's College School;
Alma mater	University of Bishop's College (no degree)
Known for	Inventing amplitude modulation (1900); Inventing the beat frequency oscillator (1901); Inventing the hot-wire barretter (1902); Patenting a heterodyne (1905); Fessenden oscillator (1912);
Spouse	Helen May Trott (m. 1890)
Children	1
Mother	Clementina Trenholme
Awards	IRE Medal of Honor (1921); John Scott Medal (1922);
	Engineering career
Discipline	Electrical engineering
Sub-discipline	Radio-frequency engineering
Years active	1886–1932
Institutions	Purdue University (1892–1893); University of Pittsburgh ; (1893–1900);
Employer(s)	Edison Machine Works (1886); West Orange Laboratory ; (1886–1890); U.S. Weather Bureau ; (1900–1902);

Reginald Aubrey Fessenden (October 6, 1866 – July 22, 1932) was a Canadian-American electrical engineer and inventor who received hundreds of patents in fields related to radio and sonar between 1891 and 1936 (seven of them after his death).

Fessenden pioneered developments in radio technology, including the foundations of amplitude modulation (AM) radio. His achievements included the first transmission of speech by radio (1900), and the first two-way radiotelegraphic communication across the Atlantic Ocean (1906). In 1932 he reported that, in late 1906, he also made the first radio broadcast of entertainment and music, although that claim has not been well documented.

He did a majority of his work in the United States and, in addition to his Canadian citizenship, claimed U.S. citizenship through his American-born father.^[1]

^ ^a ^b " Reginald Fessenden U.S. passport application "Form for Native Citizen", dated August 26, 1914. The signed and notarized application stated that Fessenden was a "native and loyal citizen of the United States" who held U.S. birthright citizenship through his American-born father. In addition, although for his early U.S. patents Fessenden listed his citizenship as Canadian, in a majority of his subsequent applications he described himself as "a citizen of the United States".

[passport-1] " Reginald Fessenden U.S. passport application "Form for Native Citizen", dated August 26, 1914. The signed and notarized application stated that Fessenden was a "native and loyal citizen of the United States" who held U.S. birthright citizenship through his American-born father. In addition, although for his early U.S. patents Fessenden listed his citizenship as Canadian, in a majority of his subsequent applications he described himself as "a citizen of the United States".

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