| All Patents in class 251/251 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 8,849X | May 29, 1835 | J. Kirkpatrick | Boiler Valves and Cam of the Steam Engine |
 | 12,507 | Mar. 13, 1855 | N.T. Greene | Cut-off valve for steam-engines |
 | 20,768 | Jun. 29, 1858 | J.F. Allen | Valve-gearing for steam-engines |
| | 77,387 | Apr. 28, 1868 | W.H. Laubach | Valve for Gas Engine |
 | 426,510 | Apr. 29, 1890 | A.C. Monfort | Champagne or Mineral Water Tap |
| | 1,990,052 | Feb. 05, 1935 | A.M. Sosa | Fluid actuated drill feed |
| | 2,496,040 | Jan. 31, 1950 | W.W. Criley | Control Valve Mechanism for Clutches and Brakes |
