Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 5143394 | Ski provided with a vibration damping device A ski is provided with a device for damping vibrations which arise in use in the ski by the effect of impacts between the asperities of icy snow and the tip and tail of the ski itself. The device consists of at least one concentrated mass which is floatin... | 09/01/1992 |
