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Auction: 313 - Numismatic Collector's Series - Ft. Worth, TX
Lot: 1758

De Forest Phonofilm Corp (DE), 10 shs, 1925, #A189, signed by Lee de Forest as president, brown, toning at right edge, folds, VF+. Lee de Forest (1873-1961) is widely recognized as a father of the electronic era, for his crucial role in the development of the vacuum tube, which made long-range radio, telephone, and radar practicable. His other great innovation was in the creation of sound motion pictures, where he devised a method of coding the sound on the film itself, allowing for perfect synchronization; he founded De Forest Photofilm to make and market his invention.

Sold for
$330