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| All Patents in class 91/163 | |||||
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| Number | Date | Patentee | Title | Type | |
| 182,196 | Sep. 12, 1876 | L. Huntoon | Improvement in compound steam-engines | steam engines | |
| 187,092 | Feb. 06, 1877 | R.D. Bradley | Gas-Engine | gas and gasoline engines | |