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 |
| 5669029 | Photographic processing A method of controlling the replenishment of a processing solution used for processing a photographic material in photographic processing apparatus, wherein replenishment chemistry is added to the processing solution and the replenishment rate is controll... | 09/16/1997 |
| 4933698 | Automatic developing machine for disk film An automatic developing machine for a disk film comprises, a passage of a cartridge or the disk film, a sensor to detect whether the cartridge or the disk film exists in a portion of the passage or not, and means for controlling operation of the machine a... | 06/12/1990 |
