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| All Patents in class 91/158 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 262,476 | Aug. 08, 1882 | E. Reynolds | Valve Gear for Compound Engines | |
 | 381,747 | Apr. 24, 1888 | J. Young | Valve-gear | |
| 407,580 | Jul. 23, 1889 | H. Davey | Pumping Engine | ||
 | 423,963 | Mar. 25, 1890 | J.B. Stanwood | Steam-engine | |
| 430,311 | Jun. 17, 1890 | J.W. Eisenhuth | Cut-Off for Compound Engines | ||
 | 475,427 | May 24, 1892 | E.J. Woolf | Single Cylinder Compound Engine | |
| 2,630,788 | Mar. 10, 1953 | H.G. Mueller | Valve Operating Mechanism for Controlling the Steam Events in Steam Engines | ||