| All Patents in class 91/271 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 7,838 | Dec. 17, 1850 | S.H. Gilman | Expansion-Gear for Horizontal Engines | steam engine valve gear |
| 422,769 | Mar. 04, 1890 | N.T. Greene | Liberating valve-gear for engines | steam engine valve gear |
| 513,929 | Jan. 30, 1894 | F.G. Hobart | Steam Engine | steam engine valves |
| 748,931 | Jan. 05, 1904 | G.F. Conner | Valve Gear for Engines | steam engine valve gear |
| 790,358 | May 23, 1905 | H.F. Frisbie | Steam Engine | steam engines |
| 1,033,280 | Jul. 23, 1912 | E.F. Williams, L. Skinner | Steam Engine | steam engines |
| 1,097,543 | May 19, 1914 | J.C. Glenn | Engine Valve | steam engine valves |
| 1,260,184 | Mar. 19, 1918 | J.C. Glenn | Fluid-Operated Valve Mechanism | steam engine valves |
| 1,927,527 | Sep. 19, 1933 | H.G. Mueller | Valve Gear | steam engine valve gear |
| 2,470,415 | May 17, 1949 | E.Y. Seborg | Drive mechanism | |
| 2,572,652 | Oct. 23, 1951 | H.G. Mueller | Multiple Expansion Steam Engine | steam engines |
| 2,598,480 | May 27, 1952 | J.W. Wright | Power-operated saw having oppositely reciprocating saw blades. | handheld power reciprocating saws |
| 3,464,315 | Sep. 02, 1969 | H.A. Weyer | Mechanical pneumatic servo control system for high-speed impact devices | drop hammers |
