| All Patents in class 251/263 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
| | 86,346 | Feb. 02, 1869 | J. Ashcroft | Safety Valve |
 | 453,012 | May 26, 1891 | J.F. Lonergan | Cock or faucet |
| | 530,508 | Dec. 11, 1894 | H.T. Dawson | Gas Engine |
 | 776,422 | Nov. 29, 1904 | J. Powell | Lubricator |
 | 818,714 | Apr. 24, 1906 | H.J. Smith | Valve Mechanism for Gas Engines |
| | 1,142,853 | Jun. 15, 1915 | E.F. Williams, L. Skinner | Steam Engine Valve Gear |
| | 1,678,905 | Jul. 31, 1928 | M.J. Goldberg | Pressure Relief Means |
| | 2,275,624 | Mar. 10, 1942 | A.G. Hann | Control Device |
| | 2,620,823 | Dec. 09, 1952 | R.D. Wortendyke, R.R. Adams | Tracer Valve Mechanism with Dashpot |
| | 2,903,234 | Sep. 08, 1959 | H. Steinhauer, V.v. Sundt | Timed Valve with Cam Actuator |
