Lee De Forest - stock photo
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Lee De Forest

Lee De Forest (1873-1961), an American inventor, who in 1906 invented the first vacuum tube known as the Audion, which amplifies weak electrical signals. De Forest was a pioneer in the field of electronics, with over 300 patents to his credit.

Credit
Science Source / Science Source

Dimensions
2015 x 2641 pixels

Print Size @ 300 dpi
7 x 9 inches / 17 x 22 cm

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