| All Patents in class 100/46 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 1,900,050 | Mar. 07, 1933 | W. Ernst | Hydraulic Press Platen Travel Equalizer | hydraulic presses |
| 2,978,976 | Apr. 11, 1961 | M.W. Hazelton, R.E. Griesheimer, C.J. Ostendorf | Level control for press brakes and the like | sheet metal brakes |
| 3,059,431 | Oct. 23, 1962 | F.E. Munschauer, Jr., G.H. Trautman, Jr., C.O. Jones, Jr. | Hydraulic power transmission systems for press brakes and like machines | punch presses |
| 3,120,799 | Feb. 11, 1964 | H.B. Van Auken, J.J. Strnad | Platen-leveling control system for hydraulically-actuated brake presses | hydraulic metalworking presses |
| 4,828,474 | May 09, 1989 | R. Ballantyne | Hydraulic cylinder device for platen spacing indication and control | hydraulic metalworking presses |
| 5,156,782 | Oct. 20, 1992 | R. Ballantyne | Maintaining press platens in parallel relationship | hydraulic metalworking presses |
