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 |
| 4836233 | Method and apparatus for venting vacuum processing equipment Controlled, low-turbulence venting of a semiconductor processing vacuum chamber is provided by a venting system including sensing elements for sensing gas conditions, including pressure, in the chamber during venting, and vent rate control elements, inclu... | 06/06/1989 |
