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 |
| 7025671 | Aerodynamic suction ventilator A surface mounted device includes a hollowed base body mounted on a building or vehicle exterior, and a hollowed raised body supported and secured on the base body with hollowed elongated members. A free space is formed between the base body and the raised body. An ... | 04/11/2006 |
| 6926206 | Air heating device for integration into an air-conducting housing arrangement An air heating device for integration into an air-conducting housing arrangement, particularly a housing arrangement of a vehicle air conditioner, includes a burner region, a heat exchanger region with a heat exchanger body, wherein in the heat exchanger body a comb... | 08/09/2005 |
| 5085132 | Ventilating apparatus A ventilating apparatus includes a duct including an indoor air inlet port for taking in indoor air and an indoor air outlet port for discharging the indoor air to the outdoors, a one-way valve for opening the indoor air outlet port when discharging the i... | 02/04/1992 |
| 4546696 | Wall construction for a vehicle cab In construction vehicles (10) it is not uncommon to have the cab or operator's station (12) positioned directly adjacent the engine enclosure (14). Being so positioned, the transfer of the heat created by the engine (16) is often transferred directly into... | 10/15/1985 |
