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| All Patents in class 123/90.33 | |||||
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| Number | Date | Patentee | Title | Type | |
| 521,443 | Jun. 12, 1894 | S.D. Shepperd | Gas Engine | internal combustion engines | |
| 600,675 | Mar. 15, 1898 | J. Lizotte | Gas Engine | gas and gasoline engines | |