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| All Patents in class 74/837 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 236,052 | Dec. 28, 1880 | E.A. Marsh | Steam-engine valve-gear | ||
| 244,807 | Jul. 26, 1881 | A.J. Hoag | Reversing Gear for Steam Traction Engines | ||
| RE9,951 | Nov. 29, 1881 | A.J. Hoag | Reversing Gear for Steam Traction Engines | ||
 | 263,301 | Aug. 29, 1882 | C. Aultman | Valve-gear | |
| 308,567 | Nov. 25, 1884 | E.A. Marsh | Reversing-gear for steam-engines | ||
| 692,913 | Feb. 11, 1902 | W.N. Rumely | Valve Gearing | ||
| 1,395,331 | Nov. 01, 1921 | H.O. Baker | Valve Gear | ||