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| All Patents in class 91/247 | |||||
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| Number | Date | Patentee | Title | Type | |
| 35,070 | Apr. 29, 1862 | J.F. Allen | Improved link-motion for steam-engines | steam engines | |
| 155,933 | Oct. 13, 1874 | R. Eickemeyer | Improvement in steam-engines | steam engines | |
| 1,785,455 | Dec. 16, 1930 | H.G. Mueller | Steam Engine | steam engines | |