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| All Patents in class 91/157 | |||||
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| Number | Date | Patentee | Title | Type | |
| 318,003 | May 19, 1885 | J.H. Eickershoff, J.F. Krieger | Compound Steam Engine | compound steam engines | |
| 359,707 | Mar. 22, 1887 | W. Brown | Valve for Steam Engines | steam engine valves | |
| 471,253 | Mar. 22, 1892 | C.T. Noyes, T.W. Heintzelman | Valve Gear for Compound Engines | steam engine valve gear | |
| 2,572,652 | Oct. 23, 1951 | H.G. Mueller | Multiple Expansion Steam Engine | compound steam engines | |