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 |
| 5706891 | Gravel pack mandrel system for water-flood operations A gravel packed water-flood fluid injection mandrel is provided for a water-flood well which includes a side pocket having flow control device therein for injection of pumped water-flood fluid from the mandrel into a subsurface formation of interest. A gr... | 01/13/1998 |
| 5704736 | Dove-tail end mill having replaceable cutter inserts A dove-tail end mill having a cutter shank with a milling head supporting a plurality of replaceable standard 60° triangular cutter inserts. The cutter inserts are designed and oriented with respect to the cutter head to position cutter edges for generat... | 01/06/1998 |