1947John Hays Hammond had nearly 400 patents in the fields of radar, radio, and television.People and Communities, Economy and Industry, Technology, Notable People

John Hays Hammond. US1318342A, 7 Oct. 1919, https://patents.google.com/patent/US1318342A/en.
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John Hays Hammond, Jr. started the Hammond Radio Research Laboratory in Gloucester. Many of the patents began in radio control before extending to electronics, naval weapons, national defense, as well as various consumer products. RCA was the recipient of many of his core patents, and he served on its Board for over 25 years.

“About John Hays Hammond, Jr.” Hammond Castle Museum, https://www.hammondcastle.org/about/john-hays-hammond-jr/
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