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 |
| 6286258 | Movable wall A movable wall has a plurality of movable wall elements mounted in horizontally oriented guide rails. The guide rail which defines the path of the movable wall elements from the parked position into the closed position is laid out in a 90 degree curve in ... | 09/11/2001 |
| 4527355 | Opening and closing type louver device An opening and closing type louver device comprising a louver in which a number of blades are arranged in a row in a required spaced relation on rotating shafts within a frame. Each blade is opened and closed by a driving mechanism while maintaining their... | 07/09/1985 |
