| All Patents in class 74/837 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 236,052 | Dec. 28, 1880 | E.A. Marsh | Steam-engine valve-gear | steam engine valve gear |
| 244,807 | Jul. 26, 1881 | A.J. Hoag | Reversing Gear for Steam Traction Engines | traction engine propulsion components |
| RE9,951 | Nov. 29, 1881 | A.J. Hoag | Reversing Gear for Steam Traction Engines | traction engine propulsion components |
| 263,301 | Aug. 29, 1882 | C. Aultman | Valve-gear | valve gear |
| 308,567 | Nov. 25, 1884 | E.A. Marsh | Reversing-gear for steam-engines | steam engines |
| 692,913 | Feb. 11, 1902 | W.N. Rumely | Valve Gearing | traction engine valve gear |
| 1,395,331 | Nov. 01, 1921 | H.O. Baker | Valve Gear | steam engine valve gear |
