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| All Patents in class 60/309 | |||||
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| Number | Date | Patentee | Title | Type | |
| 41,299 | Jan. 19, 1864 | P. Hugon | Gas Engine | gas and gasoline engines | |
| 1,868,355 | Jul. 19, 1932 | M.J. Goldberg | Manifold Construction | exhaust mechanisms | |