Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 6609907 | Apparatus and method to control emissions of nitrogen oxide A combustion apparatus and process for improved flue gas recirculation wherein the recirculation line penetrates into an exhaust duct, such as the exhaust stack for capturing and directing a portion of said flue gas through the recirculation line which is... | 08/26/2003 |
| 6599119 | Apparatus and method to control emissions of nitrogen oxide A combustion apparatus which has a post combustion hot gas fan and a recirculation duct positioned down stream from the fan to reduce NOx emissions by returning a portion of the exhaust from the combustion zone back to the combustion zone. For example, in... | 07/29/2003 |
