https://natedsanders.com/LotDetail.aspx?inventoryid=41760
Lot Detail - Prolific Inventor Lee De Forest Typed Letter Signed
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https://www.radioworld.com/tag/lee-de-forest
Lee de Forest - Radio World
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https://es.dbpedia.org/page/Lee_De_Forest
About: Lee De Forest
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https://nl.wikipedia.org/wiki/Lee_De_Forest
Lee De Forest - Wikipedia
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https://usedmedicaltools.com/vintage-lee-de-forest-dynatherm-hte-300-electro-medical-apparatus.php
Vintage Lee De Forest Dynatherm HTE-300 Electro-Medical Apparatus
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https://www.rfcafe.com/references/radio-electronics/lee-de-forest-radio-history-radio-electronics-september-1961.htm
Lee de Forest, Father of Radio, 1873-1961, September 1961 Radio-Electronics - RF Cafe
Mr. Gernsback, a prolific inventor and publisher himself - was a good personal friend of Dr. de Forest
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https://info.mysticstamp.com/this-day-in-history-august-26-1873_tdih/
Birth of Lee de Forest | Mystic Stamp Discovery Center
Aug 25, 2025 - Lee de Forest was born on August 26, 1873, in Council Bluffs, Iowa. His inventions made long-distance telephone service, radio broadcasting, television, and...
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https://digitalcollections.syr.edu/Documents/Detail/letter-lee-de-forest-to-hugo-gernsback-1962/23877
Letter, Lee de Forest to Hugo Gernsback, 1962 - Syracuse University Libraries Digital Collections
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