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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 5437457 | Golf ball trajectory and spin sensing system A golf simulator is provided with an improved trajectory sensing and spin detector. The trajectory sending system includes a first row of light sensors located adjacent to a tee and receiving light from a first light source directly above the tee. Second ... | 08/01/1995 |
| 5354063 | Double position golf simulator An improved golf simulation system for two players is contained in a single booth, which has a single screen on which are projected various views of simulated golf holes and into which two golfers independently but concurrently hit golf balls from within ... | 10/11/1994 |
