Cover letter dated July 2, 1912 for the patent application f
ID: 628450
This article refers to the component: To the tube/semiconductor
Cover letter dated July 2, 1912 for the patent application f
18.Jun.23 02:42
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Cover letter dated July 2, 1912 for the patent application for the Pickard Audion.
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Cover letter dated July 2, 1912 for the patent application f
18.Jun.23 09:05
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The "Pickard Application for Valve was received ..." is most likely US Patent 1128817, July 3, 1912, Valve Detector for Wireless, G.W. Pickard, see picture.
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