...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 |
| 7213449 | Flat track chassis dynamometer A chassis dynamometer for use with a test vehicle such as a snowmobile is provided. First and second spaced apart rolls support the test vehicle. A belt is arranged around the first and second rolls and rotationally couples the rolls to one another. The belt include... | 05/08/2007 |