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 |
| 5184992 | Multi-station physical exercise apparatus What is disclosed is a physical exercise apparatus including two barbell disc carrying carriages each of which is independently, freely moveable along a pair of vertical rails upon each of which it is mounted by a pair of widely spaced outboard bearings. ... | 02/09/1993 |
| 3986977 | Methods of disposing of radioactive waste Methods are discussed for treating liquid and particulate radioactive waste materials for transportation and storage. The disclosed methods include the reading of an ohmmeter connected across a pair of separate and mutually insulated liquid level sensing ... | 10/19/1976 |
| 3986363 | Engine synchronizer An engine synchronizer for synchronizing the speed of a slave engine with the speed of a master engine is disclosed. The disclosed synchronizer includes a comparison and control circuit deriving input signals from the distributors of two engines, e.g., th... | 10/19/1976 |
