Category:1945 patents
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Media in category "1945 patents"
The following 8 files are in this category, out of 8 total.
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US2382413 Electrical musical aparatus (1943-05-10 filed, 1945-08-14 published) by John M Hanert - Hammond Vibrato Scanner 01.pdf 1,158 × 1,702, 19 pages; 2.21 MB