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| All Patents in class 91/163 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 182,196 | Sep. 12, 1876 | L. Huntoon | Improvement in compound steam-engines | |
| 187,092 | Feb. 06, 1877 | R.D. Bradley | Gas-Engine | ||
| 407,184 | Jul. 16, 1889 | J.H. Eickershoff | Single Acting Compound Engine | ||