Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 5303158 | Misfire-detecting system for an internal combustion engine A system for detecting abnormality in combustion of an internal combustion engine based on fluctuations in the rotational speed of the engine. A signal corresponding to the rotational speed of the engine is subjected to frequency analysis. Abnormality in ... | 04/12/1994 |
| 4086888 | Electronic vacuum modulator for controlling air flow to a throttle modulator mechanism for limiting engine speed and vehicle speed An electronic vacuum modulator is disclosed for controlling air flow to a throttle valve modulator mechanism for limiting the maximum speed of an engine and, optionally, for also limiting the maximum vehicle speed. An electric signal having a frequency pr... | 05/02/1978 |
