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| All Patents in class 123/41.41 | |||||
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| Number | Date | Patentee | Title | Type | |
| 658,595 | Sep. 25, 1900 | W.E. Simpson | Internal-Combustion Motor | internal combustion engines | |
| 681,441 | Aug. 27, 1901 | W.L. Corson | Exhaust Mechanism for Explosive Engines | exhaust mechanisms | |