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 |
| 7645362 | Method for pretreating and improving coking coal quality for blast furnace coke Methods for pretreating and improving coking coal quality for producing blast-furnace coke by: (a) rapid-heating the coal charge in a fluidized-bed to a temperature range between not lower than 300° C. and not higher than the temperature at which the coal charge be... | 01/12/2010 |
| 6797122 | Coke oven and method of operating the same A coke oven and a method of operating the same, capable not only of achieving a uniform combustion temperature heightwise within a combustion chamber when a rich gas or a lean gas is burnt, but also of reducing NOx content in the waste gas, while eliminat... | 09/28/2004 |
| 6033528 | Process for making blast furnace coke A blast furnace coal is produced by rapidly heating a coal blend having 10 to 30% by weight of a non-slightly-caking coal having softening initiation temperature T with the balance including a caking coal having softening initiation temperature T0 | 03/07/2000 |
| 5799275 | Speech recognizing device and method assuming a current frame is an end point of a current reference pattern A speech recognition system automatically designates a scope of a partial reference pattern. Plural reference patterns, each of which ends in each of composing frames and starts from a preceding frame, are supposed and cumulative distances at every frame ... | 08/25/1998 |
| 5720116 | Apparatus for drying and heating coal to be charged to coke oven In a sloped tower type airborne drying and heating apparatus, a bulge or a neck is provided at at least one location in the inner wall of a sloped pipe for the purpose of reducing in a range of 3 to 50% the cross-section of a flow path in the pipe. Coal c... | 02/24/1998 |
