| All Patents in class 91/259 |
Patents 1 -
10
of 20
      |
| Picture | Number | Date | Patentee | Title |
 | 2,227 | Aug. 21, 1841 | H. Allen | Cut-off valve for steam-engines |
| | 4,028 | May 01, 1845 | T. Rogers | Cut-Off Valve for Steam Engines |
 | 6,324 | Apr. 17, 1849 | G. McKay | Piston-valve cut-off |
 | 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 |
 | 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 |
 | 73,069 | Jan. 07, 1868 | J.F. Allen | Improvement in valve-gear |
| | 73,415 | Jan. 14, 1868 | H.O. Lothrop | Improvement in steam-engines cut-offs |
 | 75,034 | Mar. 03, 1868 | H.O. Lothrop | Improvement in steam-engines cut-offs |
