Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 6491105 | Cross-over housing for gas lift valve The present invention provides a cross-over housing for a gas lift valve. In the present invention, the series of radial apertures, or jets, typically utilized within the cross-over housing of a production pressure operated gas lift valve are removed. In ... | 12/10/2002 |
| 6154144 | Auto shutoff overflow controller The Automatic Shutoff Overflow Controller comprises a circuit which engages between a source of power and a water processing device, the controller, sensing an undesirably high water level in the device, shutting off the device and producing an audible wa... | 11/28/2000 |
| 5752483 | Governor arrangement A governor arrangement for an internal combustion engine is disclosed which comprises a plurality of weights rotatable with a rotatable drive shaft and pivotable with respect to the shaft. The weights are engageable with a washer which, in turn, engages a... | 05/19/1998 |
