| All Patents in class 91/448 |
Patents 16 -
23
of 23
      |
| Number | Date | Patentee | Title | Type |
| 2,286,880 | Jun. 16, 1942 | W.A. Traut | Hydraulic Control System | |
| 2,313,438 | Mar. 09, 1943 | W.G. Hoelscher | Fluid Operated Gear Shifting Mechanism | metalworking speed changing mechanisms |
| 2,388,832 | Nov. 13, 1945 | W.W. Criley | Control Mechanism | machine tool controls |
| 2,441,339 | May 11, 1948 | S.A. Rivington | Hydraulic system | |
| 2,713,772 | Jul. 26, 1955 | H. Horlacher | Hydraulic Transmission and Control for Machine Tool Tables | machine tool controls |
| 2,972,868 | Feb. 28, 1961 | B. Sassen | Machine tool slide control | |
| 3,596,569 | Aug. 03, 1971 | J.D. Wisbey | Valve for a Closed-Loop Hydraulic Torque Amplifier | hydraulic apparatus |
| 3,913,450 | Oct. 21, 1975 | R. MacGregor | Hydraulic control system for press brakes or the like | sheet metal brakes |
