| All Patents in class 137/625.25 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 8,480X | Oct. 30, 1834 | T.B. Stillman | Valves for steam engines | steam engine valves |
| 4,542 | May 28, 1846 | W.H. Baker, H.R. Worthington | Balancing valves of steam-engines | steam engine valves |
| 6,128 | Feb. 20, 1849 | J. Mulbery | Short Slide-Valve by Chamfering Corners | |
| 35,068 | Apr. 29, 1862 | J.F. Allen | Steam-engine | steam engines |
| 35,069 | Apr. 29, 1862 | J.F. Allen | Improvement in slide-valves for steam-engines | steam engine valve gear |
| 95,868 | Oct. 19, 1869 | J.F. Allen | Improvement in steam-engine slide-valves | steam engine valves |
| 147,993 | Feb. 24, 1874 | E.D. Speer | Balanced Slide Valve | steam engine valves |
| 197,076 | Nov. 13, 1877 | R.W. Aitken | Balanced-Valve | steam engine valves |
| 314,120 | Mar. 17, 1885 | C.M. Giddings | Slide Valve | steam engine valves |
| 331,018 | Nov. 24, 1885 | D.A. Woodbury | Balanced Slide Valve | steam engine valves |
| 1,819,703 | Aug. 18, 1931 | W. Ernst | Valve | hydraulic motor controls |
| 2,363,111 | Nov. 21, 1944 | R.D. Bennett | Hydraulic valve | hydraulic apparatus |
| 2,526,361 | Oct. 17, 1950 | C. Johnson | Control valve for fluid servomotors | milling machine accessories |
