| All Patents in class 100/256 |
Patents 16 -
21
of 21
      |
| Number | Date | Patentee | Title | Type |
| 1,895,710 | Jan. 31, 1933 | H.F. MacMillin, W. Ernst | Hydraulic Press | hydraulic presses |
| 1,901,291 | Mar. 14, 1933 | W. Ernst | Hydraulic Press | hydraulic presses |
| 1,927,583 | Sep. 19, 1933 | W. Ernst | Hydraulic Motor Control Means | hydraulic motor controls |
| 1,937,192 | Nov. 28, 1933 | H.F. MacMillin, W. Ernst | Control Mechanism for Hydraulic Motors | hydraulic motor controls |
| 1,945,496 | Jan. 30, 1934 | G.A. Highberg, H.E. Sloan | Press Actuating Mechanism | punch presses |
| 3,041,963 | Jul. 03, 1962 | M.W. Hazelton, C.J. Ostendorf | Stop device for press brakes and the like | sheet metal brakes |
