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 |
| 3955238 | Dog brush A dog brush is provided for attachment to a conventional vacuum cleaner. Semi-flexible plastic bristles are curved in the direction in which the brush is drawn across a dog, whereby to cradle loose hairs transversely of the air flow into the vacuum cleane... | 05/11/1976 |
