Fleming Valve (First Vacuum Tube) Patent Print
Patent No. US803684 · 1905
Invented by John Ambrose Fleming
Vintage 1905 patent drawing of the fleming valve (first vacuum tube) by John Ambrose Fleming. Museum-quality archival giclée print.
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About This Print
Vintage 1905 patent drawing of the fleming valve (first vacuum tube) by John Ambrose Fleming. Museum-quality archival giclée print.
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