Patents
Pupin released about 70 technical articles and reviews and 34 patents.
| Number of patent | Date | |
|---|---|---|
| U.S. Patent 519,346 Apparatus for telegraphic or telephonic transmission | 8 May 1894 | |
| U.S. Patent 519,347 Transformer for telegraphic, telephonic or other electrical systems | 8 May 1894 | |
| U.S. Patent 640,515 Art of distributing electrical energy by alternating currents | 2 January 1900 | |
| U.S. Patent 640,516 Electrical transmission by resonance circuits | 2 January 1900 | |
| U.S. Patent 652,230 Art of reducing attenuation of electrical waves and apparatus therefore | 19 June 1900 | |
| U.S. Patent 652,231 Method of reducing attenuation of electrical waves and apparatus therefore | 19 June 1900 | |
| U.S. Patent 697,660 Winding-machine | 15 April 1902 | |
| U.S. Patent 707,007 Multiple telegraphy | 12 August 1902 | |
| U.S. Patent 707,008 Multiple telegraphy | 12 August 1902 | |
| U.S. Patent 713,044 Producing asymmetrical currents from symmetrical alternating electromotive process | 4 November 1902 | |
| U.S. Patent 768,301 Wireless electrical signalling | 23 August 1904 | |
| U.S. Patent 761,995 Apparatus for reducing attenuation of electric waves | 7 June 1904 | |
| U.S. Patent 1,334,165 Electric wave transmission | 16 March 1920 | |
| U.S. Patent 1,336,378 Antenna with distributed positive resistance | 6 April 1920 | |
| U.S. Patent 1,388,877 Sound generator | 3 December 1921 | |
| U.S. Patent 1,388,441 Multiple antenna for electrical wave transmission | 23 December 1921 | |
| U.S. Patent 1,415,845 Selective opposing impedance to received electrical oscillation | 9 May 1922 | |
| U.S. Patent 1,416,061 Radio receiving system having high selectivity | 10 May 1922 | |
| U.S. Patent 1,456,909 Wave conductor | 29 May 1922 | |
| U.S. Patent 1,452,833 Selective amplifying apparatus | 24 April 1923 | |
| U.S. Patent 1,446,769 Aperiodic pilot conductor | 23 February 1923 | |
| U.S. Patent 1,488,514 Selective amplifying apparatus | 1 April 1923 | |
| U.S. Patent 1,494,803 Electrical tuning | 29 May 1923 | |
| U.S. Patent 1,503,875 Tone producing radio receiver | 29 April 1923 |
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