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 |
| 5756926 | EFI detonator initiation system and method In one aspect of the invention, an environmentally insensitive initiator, including: an electro-explosive device responsive to an electrical signal of unique voltage and frequency applied to the electro-explosive device, the unique voltage and frequency b... | 05/26/1998 |
