Category:1934 patents
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Media in category "1934 patents"
The following 6 files are in this category, out of 6 total.
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Brevet d'Invention No. 773.415.pdf 1,237 × 1,650, 4 pages; 229 KB
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Krupp-renn Johannsen patent US1964917.png 1,153 × 454; 135 KB
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Norman Bel Geddes 1933 patent for a liner USD91579.pdf 1,158 × 1,702, 2 pages; 76 KB
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US 2042976 A.png 2,320 × 3,408; 55 KB
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US1956350A Electrical Musical Instrument (1934-01-19 filed, 1934-04-24 published) by Laurens Hammond - Hammond Organ.pdf 1,158 × 1,702, 37 pages; 3.71 MB