| All Patents in class 251/175 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
| | 15,400 | Jul. 22, 1856 | H.R. Worthington | Relieving steam slide-valves from pressure |
 | 167,865 | Sep. 21, 1875 | J.F. Allen | Improvement in balanced valves |
| | 204,018 | May 21, 1878 | H.F. Frisbie | Puppet-Valve |
| | 248,728 | Oct. 25, 1881 | H.F. Frisbie | Puppet Valve |
 | 1,014,591 | Jan. 09, 1912 | W.F. Gould | Balanced Valve |
 | 1,014,592 | Jan. 09, 1912 | W.F. Gould | Balanced Valve |
 | 1,744,037 | Jan. 21, 1930 | W.R. Brown | Spray Gun |
| | 1,942,589 | Jan. 09, 1934 | G.A. Biggs | Hydraulic Turbine |
| | 2,972,357 | Feb. 21, 1961 | C.S. Gladoske, R.L. Ford | Hydraulic Rotary Selector Valve |
