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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 4309608 | Flightline goggle tester A compact modularized go-no-go resolution tester is provided for use with /PVS-5 image intensifier goggles. The tester can be quickly disassembled and reassembled by operators having little or no skill and training to replace broken or expendible parts th... | 01/05/1982 |
| 4302531 | Method of manufacture of photodiode A process is described in which planar photodiodes are formed by diffusing lead into p-type Pb0.8 Sn0.2 Te single crystal material.... | 11/24/1981 |
| 4149228 | Compact uniform light diffuser and attenuator A compact uniform light diffuser and attenuator is supplied for use with h resolution transparencies and the like, particularly standard resolution patterns.... | 04/10/1979 |
