| All Patents in class 91/259 |
Patents 1 -
15
of 20
      |
| Number | Date | Patentee | Title | Type |
| 2,227 | Aug. 21, 1841 | H. Allen | Cut-off valve for steam-engines | steam engine valve gear |
| 4,028 | May 01, 1845 | T. Rogers | Cut-Off Valve for Steam Engines | steam engine valves |
| 6,324 | Apr. 17, 1849 | G. McKay | Piston-valve cut-off | steam check valves |
| 10,185 | Nov. 01, 1853 | L.R. Faught | Regulating the speed of steam-engines | |
| 16,781 | Mar. 10, 1857 | J.F. Allen | Improvement in cut-offs for steam-engines | steam engine valve gear |
| 33,274 | Sep. 10, 1861 | A.S. Walbridge | Improvement in cut-off apparatus for steam-engines | |
| 54,090 | Apr. 24, 1866 | G.H. Babcock, S. Wilcox, Jr. | Improvement in cut-off valves | steam engine valves |
| 73,069 | Jan. 07, 1868 | J.F. Allen | Improvement in valve-gear | steam engine valve gear |
| 73,415 | Jan. 14, 1868 | H.O. Lothrop | Improvement in steam-engines cut-offs | steam engine governors |
| 75,034 | Mar. 03, 1868 | H.O. Lothrop | Improvement in steam-engines cut-offs | steam engine governors |
| 158,669 | Jan. 12, 1875 | H. Bilgram | Improvement in cut-off valve-gears | steam engine valve gear |
| 164,132 | Jun. 08, 1875 | H. Bilgram | Improvement in cut-off-valve gears | steam engine valve gear |
| 172,116 | Jan. 11, 1876 | A.O. Whittemore, G.W. Hall | Engine-Governor | steam engine governors |
| 222,376 | Dec. 09, 1879 | A.B. Fils | Expansion-Valve for Steam Engines | steam engine valves |
| 252,224 | Jan. 10, 1882 | D. Joy | Steam Engine Valve Gear | steam engine valve gear |
