| All Patents in class 91/351 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 93,125 | Jul. 27, 1869 | C.E. Rymes | Valve gear for rotary valves | steam engine valve gear |
| 208,565 | Oct. 01, 1878 | J. Butcher | Rotary- Engine | rotary steam engines |
| 422,769 | Mar. 04, 1890 | N.T. Greene | Liberating valve-gear for engines | steam engine valve gear |
| 425,219 | Apr. 08, 1890 | N.T. Greene | Exhaust-valve-gear for engines | steam engine valve gear |
| 602,161 | Apr. 12, 1898 | A. Howard | Motive Engine | steam engines |
| 748,931 | Jan. 05, 1904 | G.F. Conner | Valve Gear for Engines | steam engine valve gear |
| 1,927,527 | Sep. 19, 1933 | H.G. Mueller | Valve Gear | steam engine valve gear |
