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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 |
| 6149532 | Golf ball impact detection system for improving a golf swing A golf ball impact detection system to assist a golfer in reducing premature head-up movement. The impact detection system includes a sound detection device for detecting an impact sound of a club head with a golf ball and a light source which turns on im... | 11/21/2000 |
| 5599239 | Headwatcher A device which monitors the head turn movement of a golfer during a golf swing. It gives the golfer instantaneous feedback by informing him whether his head turned prior to or after the golf club struck the ball. This feedback is done in the form of a dig... | 02/04/1997 |
