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Lee De Forest: King of Radio, Television, and Film: 2012 by Professor Mike D. Adams (Paperback, 2011)
Price:
AU $87.72
+ AU $9.98 postage
Returns:
30-day returns. Buyer pays for return postage.
Condition:
Beginning in 1918 he began to develop a light valve, a device for writing and reading sound using light patterns. While he received many patents for his process, he was initially ignored by the film industry.