| All Patents in class 91/271 |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
| | 7,838 | Dec. 17, 1850 | S.H. Gilman | Expansion-Gear for Horizontal Engines |
 | 422,769 | Mar. 04, 1890 | N.T. Greene | Liberating valve-gear for engines |
| | 513,929 | Jan. 30, 1894 | F.G. Hobart | Steam Engine |
| | 748,931 | Jan. 05, 1904 | G.F. Conner | Valve Gear for Engines |
| | 790,358 | May 23, 1905 | H.F. Frisbie | Steam Engine |
| | 1,033,280 | Jul. 23, 1912 | E.F. Williams, L. Skinner | Steam Engine |
| | 1,097,543 | May 19, 1914 | J.C. Glenn | Engine Valve |
| | 1,260,184 | Mar. 19, 1918 | J.C. Glenn | Fluid-Operated Valve Mechanism |
| | 1,927,527 | Sep. 19, 1933 | H.G. Mueller | Valve Gear |
| | 2,470,415 | May 17, 1949 | E.Y. Seborg | Drive mechanism |
