Category:1946 patents
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Media in category "1946 patents"
The following 3 files are in this category, out of 3 total.
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Tolnai Transmission device 1, Patent US2400668.PNG 2,480 × 3,507; 613 KB
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Tolnai Transmission device 2, Patent US2400668.PNG 2,480 × 3,507; 660 KB
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Tolnai Transmission device drawing, Patent US2400668.PNG 2,480 × 3,507; 377 KB