| All Patents in class 91/461 |
Patents 1 -
10
of 15
      |
| Picture | Number | Date | Patentee | Title |
| | 989,009 | Apr. 11, 1911 | C.L. Heisler | Cylinder Drain Cock Operating Mechanism |
 | 992,161 | May 16, 1911 | A.D. Catlin | Valve mechanism |
| | 1,353,656 | Sep. 21, 1920 | C.L. Heisler | Fluid Operated Motor |
| | 1,931,452 | Oct. 17, 1933 | L.G. Wheeler | Hydraulic machine tool feed |
 | 1,937,244 | Nov. 28, 1933 | G.M. Pelton | Control means for dogging mechanism |
| | 2,139,173 | Dec. 06, 1938 | E.G. Roehm, M. Romaine | Control Circuit for Broaching Machines |
| | 2,170,503 | Aug. 22, 1939 | H. Ernst, M.E. Martellotti | Milling Machine |
| | 2,172,981 | Sep. 12, 1939 | G.F. Maglott | Fluid Pressure Driving and Reversing Mechanism |
| | 2,464,626 | Mar. 15, 1949 | A.P. Waterson | Pilot Operated Servo Valve |
| | 2,474,134 | Jun. 21, 1949 | A.P. Waterson | Hydraulic Tool Control Unit |
