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List of Reginald Fessenden patents

Last updated September 13, 2025

The list of Reginald Fessenden patents contains the innovation of his pioneering experiments. Reginald Aubrey Fessenden received hundreds of patents for devices in fields such as high-powered transmitting, sonar, and television.

Patents

U.S. patent 452,494 , "Lead-in Wire for Incandescent Electric Lamps" – 18 February 1891
U.S. patent 453,742 , "Manufacture of Incandescent Electric Lamps" – 9 June 1891
U.S. patent 506,311 , "Molding for Electrical Conductors" – 10 October 1893
U.S. patent 638,837 , "Pencil for Incandescent Lamps" – 12 December 1899
U.S. patent 638,838 , "Pencil for Incandescent Lamps" – 12 December 1899
U.S. patent 638,839 , "Incandescent Lamp" – 12 December 1899
U.S. patent 638,840 , "Incandescent Lamp" – 12 December 1899
U.S. patent 639,161 , "Incandescent Lamp" – 12 December 1899
U.S. patent 644,972 , "Induction Coil for X-ray Apparatus" – 6 March 1900
U.S. patent 648,660 , "X-ray Apparatus" – 1 May 1900
U.S. patent 650,521 , "Incandescent Lamp" – 29 May 1900
U.S. patent 654,390 , "Induction-coil" – July 1900
U.S. patent 670,316 , "Incandescent Lamp" – 19 March 1901
U.S. patent 706,735 , "Wireless Telegraphy" – 12 August 1902
U.S. patent 706,736 , "Apparatus for Wireless Telegraphy" – 12 August 1902
U.S. patent 706,737 , "Wireless Telegraphy" – 12 August 1902
U.S. patent 706,738 , "Wireless Telegraphy" – 12 August 1902
U.S. patent 706,739 , "Conductor for Wireless Telegraphy" – 12 August 1902
U.S. patent 706,740 , "Wireless Signaling" (heterodyne principle) – 12 August 1902
U.S. patent 706,741 , "Apparatus for Wireless Telegraphy" (compressed air spark gap transmitter) – 12 August 1902
U.S. patent 706,742 , "Wireless Signaling", – 12 August 1902 (transmit-receive switch)
U.S. patent 706,743 , "Wireless Signaling", – 12 August 1902
U.S. patent 706,744 , "Current Actuated Wave Responsive Device" ("barretter" detector) – August 1902
U.S. patent 706,745 , "Signaling by Electromagnetic Waves" – issued 12 August 1902
U.S. patent 706,746 , "Signaling by Electromagnetic Waves" (ground plane) – 12 August 1902
U.S. patent 706,747 , "Apparatus for Signaling by Electromagnetic Waves" (voice modulation of 50 kHz alternator – continuous wave transmitter) – 12 August 1902
U.S. patent 715,043 , "Current Operated Receiver for Electromagnetic Waves" – 2 December 1902
U.S. patent 715,203 , "Selective Signaling by Electromagnetic Waves" (multiplex transmission and reception) – 2 December 1902
U.S. patent 727,325 , "Transmission and Receipt of Signals" – 5 May 1903
U.S. patent 727,326 , "Selective Signaling by Electromagnetic Waves" – 5 May 1903
U.S. patent 727,327 , "Receiver for Electromagnetic Waves" – 5 May 1903
U.S. patent 727,328 , "Receiver for Signaling" – 5 May 1903
U.S. patent 727,329 , "Signaling by Electromagnetic Waves" – 5 May 1903
U.S. patent 727,330 , "Signaling by Electromagnetic Waves" – May 1903
U.S. patent 727,331 , "Receiver for Electromagnetic Waves" (improved "barretter"—actually electrolytic detector) – May 1903
U.S. patent 730,753 , "Signaling by Electromagnetic Waves" – 9 June 1903
U.S. patent 731,029 , "Method of Utilizing the Energy of Waves" – 16 June 1903
U.S. patent 742,779 , "Signaling by Electromagnetic Waves" – 27 October 1903
U.S. patent 742,780 , "Signaling by Electromagnetic Waves" – 27 October 1903
U.S. patent 752,894 , "Selective Signaling" – 23 February 1904
U.S. patent 752,895 , "Signaling by Electromagnetic Waves" – 23 February 1904
U.S. patent 753,864 , "Signaling by Electromagnetic Waves" – 8 March 1904
U.S. patent 754,058 , "Signaling by Electromagnetic Waves" – 8 March 1904
U.S. patent 777,014 , "Apparatus for Transmitting and Receiving Signals" – 6 December 1904
U.S. patent 793,648 , "Receiver for Electromagnetic Waves" (sealed/pressurized electrolytic detector) – 4 July 1905
U.S. patent 793,649 , "Signaling by Electromagnetic Waves" – 4 July 1905
U.S. patent 793,650 , "Signaling by Electromagnetic Waves" – 4 July 1905
U.S. patent 793,651 , "Aerial for Wireless Signaling" (shows insulated base) – 4 July 1905
U.S. patent 793,652 , "Signaling by Electromagnetic Waves" (shows the Brant Rock tower) – 4 July 1905
U.S. patent 793,718 , "Wireless Telegraphy" – 4 July 1905
U.S. patent 793,777 , "Condenser" – 4 July 1905
U.S. patent 814,951 , "Capacity" – 13 March 1906
U.S. patent 897,278 , "Wireless Telegraphy" – 1 September 1908
U.S. patent 915,280 , "Electric Signaling" – 16 March 1909
U.S. patent 916,429 , "Receiver for Electromagnetic Waves" – 30 March 1909
U.S. patent 918,307 , "Apparatus for Wireless Signaling" – 13 April 1909
U.S. patent 928,371 , "Signaling by Electromagnetic Waves" – 20 July 1909
U.S. patent 932,111 , "Producing High Frequency Oscillations" – 24 August 1909
U.S. patent 938,836 , "Method for Cleaning Guns" – 2 November 1909
U.S. patent 941,565 , "Method for Determining Positions of Vessels" – 30 November 1909
U.S. patent 948,068 , "Wireless Telegraphy" (antenna tuning) – 1 February 1910
U.S. patent 956,489 , "Signaling by Electromagnetic Waves" – 26 April 1910
U.S. patent 960,631 , "Wireless Signaling" – 7 June 1910
U.S. patent 962,016 , "Receiver for Electromagnetic Waves" – 21 June 1910
U.S. patent 962,018 , "Method of Signaling" – 21 June 1910
U.S. patent 974,762 , "Improvements in Wireless Telegraphy" – 1 November 1910
U.S. patent 979,145 , "Electrical Signaling" – 20 December 1910
U.S. patent 998,567 , "Signaling by Electromagnetic Waves" – 18 July 1911
U.S. patent 1,002,051 , "Signaling by Electromagnetic Waves" – 29 August 1911
U.S. patent 1,002,052 , "Electrical Signaling" – 29 August 1911
U.S. patent 1,002,141 , "Determining Positions of Vessels" – 29 August 1911
U.S. patent 1,015,881 , "Means for the Transmission of Energy by Electromagnetic Waves" – 30 January 1912
U.S. patent 1,019,236 , "Signaling" – 5 March 1912
U.S. patent 1,020,032 , "Signaling by Electromagnetic Waves" – 12 March 1912
U.S. patent 1,022,540 , "Wireless Signaling" – 9 April 1912
U.S. patent 1,035,304 , "Wireless Telegraphy" – 13 August 1912
U.S. patent 1,039,717 , "High Frequency Electrical Conductor" – 1 October 1912
U.S. patent 1,048,670 , "Contact for Electromagnetic Mechanism" – 31 December 1912
U.S. patent 1,050,441 , "Electrical Signaling Apparatus" – 1925
U.S. patent 1,059,665 , "Wireless Telegraphy" (antenna tuning)– April 1913
U.S. patent 1,108,895 , "Signaling by Sound and Other Longitudinal Elastic Impulses" – 1 September 1914
U.S. patent 1,121,722 , "Agricultural Engineering" – 22 December 1914
U.S. patent 1,126,966 , "Sending Mechanism for Electromagnetic Waves" – 2 February 1916
U.S. patent 1,132,465 , "Apparatus for Converting Heat into Work" – 16 March 1915
U.S. patent 1,132,568 , "Electric Signaling" – 23 March 1915
U.S. patent 1,132,569 , "Wireless Telegraphy" – 23 March 1915
U.S. patent 1,141,386 , "Method of Transmitting and Receiving Electrical Energy" – 1 June 1915
U.S. patent 1,147,010 , "Improvements in Wireless Telegraphy" – 20 July 1915
U.S. patent 1,154,750 , "Amplifying Electrical Impulses" – 28 September 1915
U.S. patent 1,156,677 , "Apparatus for the transmission by electrical oscillation" – 12 October 1915
U.S. patent 1,158,123 , "Apparatus for Generating and Receiving Electromagnetic Waves" – 26 October 1915
U.S. patent 1,158,124 , "Signaling Apparatus Aerial Navigation" – 26 October 1915
U.S. patent 1,165,862 , "Apparatus for Wireless Signaling" – 28 December 1915
U.S. patent 1,166,892 , "Apparatus for Producing High Frequency Oscillations" – 4 January 1916
U.S. patent 1,167,366 , "Dynamo-Electric Machinery" – 4 January 1916
U.S. patent 1,170,969 , "Means of Transmitting Intelligence" – 8 February 1916
U.S. patent 1,172,017 , "Method of Transmitting Energy by Electromagnetic Waves" – 15 February 1916
U.S. patent 1,172,018 , "Electromagnetic Indicator" – 15 February 1916
U.S. patent 1,178,507 , "Wireless Signaling" – 11 April 1916
U.S. patent 1,184,843 , "Signaling by Electromagnetic Waves" – 30 May 1916
U.S. patent 1,191,072 , "Method of Using Pulverulent Matter As Fuel" – 11 July 1916
U.S. patent 1,207,388 , "Method and Apparatus for Submarine Signaling" – 5 December 1916
U.S. patent 1,212,202 , "Submarine, Subterranean, and Aerial Telephony" – 16 January 1917
U.S. patent 1,213,176 , "Apparatus for Phonograph Kinetoscopes" – 23 January 1917
U.S. patent 1,217,165 , "Power Plant" – 27, February 1917
U.S. patent 1,240,328 , "Method and Apparatus for Finding Ore Bodies" – 18 September 1917
U.S. patent 1,247,520 , "Method for Storing Power" – 20 November 1917
U.S. patent 1,265,068 , "Method and Apparatus for Producing Alternating Currents" – 7 May 1918
U.S. patent 1,268,949 , "Method and Apparatus for Agricultural Engineering" – 11 June 1918
U.S. patent 1,270,398 , "Method and Apparatus for Transmitting and Receiving Sound Waves Through Ground" – 25 June 1918
U.S. patent 1,291,458 , "Apparatus for Submarines" – 4 January 1919
U.S. patent 1,318,740 , "Method of and Apparatus for Obtaining Increased Circulation" – 14 October 1919
U.S. patent 1,319,145 , "Detecting and Locating Ships" – 21 October 1919
U.S. patent 1,348,825 , "Method of and Apparatus for Detecting Low Frequency Impulses" – 3 August 1920
U.S. patent 1,348,826 , "Method and Apparatus for Submarine Signaling and Detection" – 3 August 1920
U.S. patent 1,348,827 , "Method and Apparatus for Submarine Signaling" – 3 August 1920
U.S. patent 1,348,828 , "Method and Apparatus for Sound Insulation" – 3 August 1920
U.S. patent 1,348,855 , "Method and Apparatus for Detecting Submarines" – 10 August 1920
U.S. patent 1,374,293 , "Wireless Direction Finder" – 12 April 1921
U.S. patent 1,384,014 , "Method and Apparatus for Signaling and Otherwise Utilizing Radiant Impulses" – 5 July 1921
U.S. patent 1,384,029 , "Sound-Signaling" – 5 July 1921
U.S. patent 1,384,556 , "Apparatus for Submarine Signaling" – 3 August 1920
U.S. patent 1,394,482 , "Submarine Signaling" – 18 October 1921
U.S. patent 1,394,483 , "Method and Apparatus for Submarine Signaling" – 18 October 1921
U.S. patent 1,397,949 , "Method and Apparatus for Submarine Signaling" – 22 November 1921
U.S. patent 1,414,077 , "Method and Apparatus for Inspecting Material" – 25 April 1922
U.S. patent 1,415,539 , "Method and Apparatus for Submarine Signaling" – 9 May 1922
U.S. patent 1,429,497 , "Method and Apparatus for Detecting, Measuring, and Utilizing Low Frequency Impulses" – 19 September 1922
U.S. patent 1,453,316 , "Acoustic Method and Apparatus" – 1 May 1923
U.S. patent 1,472,558 , "Directional Receiving of Submarine Signals" – 30 October 1923
U.S. patent 1,473,979 , "Method for Eliminating Undesired Impulses" – 6 November 1923
U.S. patent 1,534,205 , "Eliminating Disturbing Energy" – 21 April 1925
U.S. patent 1,547,740 , "Means for Eliminating Disturbing Noises" – 28 July 1925
U.S. patent 1,553,152 , "Method and Apparatus for Generating Electrical Oscillations" – 8 September 1925
U.S. patent 1,561,441 , "Apparatus for Directive Signaling" – 10 November 1925
U.S. patent 1,576,735 , "Infusor" (for making tea) – March 1926
U.S. patent 1,616,416 , "Method and Apparatus for Coordinating Radio and Phonograph Reproductions" – 1 February 1927
U.S. patent 1,617,241 , "Method and Apparatus for the Transmission of Energy by High Frequency Impulses" – 8 February 1927
U.S. patent 1,863,841 , "Method and Apparatus for Coordinating Radio and Phonograph Reproductions" – 21 June 1932
U.S. patent 1,882,183 , "Means for Parking Cars" – 11 October 1932
U.S. patent 1,899,026 , "Means for Modulating Electrical Energy by Light Impulses" – 28 February 1933
U.S. patent 1,901,503 , "Rotary Brush" – 14 March 1933
U.S. patent 1,965,226 , "Method and Apparatus for Sound Transmission" – 3 July 1934
U.S. patent 1,991,892 , "Height Indicator" – 19 February 1935
U.S. patent 2,059,221 , "Television System" – 3 November 1936
U.S. patent 2,059,222 , "Television Apparatus" – 3 November 1936

Reissued

U.S. patent RE12115 "Receiver for Electromagnetic Waves" – duplicate of 727,331 reissued May 1903
U.S. patent RE12168 "Wireless Telegraphy" – duplicate of 706,737 reissued 10 November 1903
U.S. patent RE12169 "Wireless Telegraphy" – duplicate of 706,737 reissued 10 November 1903
U.S. patent RE16372 "Acoustic Method and Apparatus" – duplicate of 1,453,316 reissued 10 29 June 1926

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