Audion Triode Vacuum Tube Patent Print
Patent No. US879532 · 1908
Invented by Lee de Forest
Vintage 1908 patent drawing of the audion triode vacuum tube by Lee de Forest. Museum-quality archival giclée print.
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About This Print
Vintage 1908 patent drawing of the audion triode vacuum tube by Lee de Forest. Museum-quality archival giclée print.
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