Category:1973 patents

Media in category "1973 patents"

The following 4 files are in this category, out of 4 total.

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  Keskari, Keska-Veschluss, Österreichische Patenturkunde.jpg 1,372 × 1,935; 853 KB
  
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  US3781465A Field sequential color television systems (1).png 2,499 × 1,701; 198 KB
  
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  US3781465A Field sequential color television systems (2).png 1,701 × 2,499; 417 KB
  
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  US3781465A Field sequential color television systems (3).png 1,701 × 2,499; 261 KB