| All Patents in class 137/625.25 |
Patents 1 -
10
of 14
      |
| Picture | Number | Date | Patentee | Title |
| | 8,480X | Oct. 30, 1834 | T.B. Stillman | Valves for steam engines |
| | 4,542 | May 28, 1846 | W.H. Baker, H.R. Worthington | Balancing valves of steam-engines |
| | 6,128 | Feb. 20, 1849 | J. Mulbery | Short Slide-Valve by Chamfering Corners |
 | 35,068 | Apr. 29, 1862 | J.F. Allen | Steam-engine |
 | 35,069 | Apr. 29, 1862 | J.F. Allen | Improvement in slide-valves for steam-engines |
 | 95,868 | Oct. 19, 1869 | J.F. Allen | Improvement in steam-engine slide-valves |
| | 142,292 | Aug. 26, 1873 | W.J. Stevens | Improvement in devices for operating the valves of steam-engines |
| | 147,993 | Feb. 24, 1874 | E.D. Speer | Balanced Slide Valve |
| | 197,076 | Nov. 13, 1877 | R.W. Aitken | Balanced-Valve |
| | 314,120 | Mar. 17, 1885 | C.M. Giddings | Slide Valve |
