| All Patents in class 60/378 |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 1,851,622 | Mar. 29, 1932 | W. Ernst | Valve Mechanism for Hydraulic Presses | hydraulic presses |
| 1,870,500 | Aug. 09, 1932 | H.F. MacMillin, W. Ernst | Hydraulic Press | hydraulic presses |
| 1,884,060 | Oct. 25, 1932 | H.F. MacMillin | Hydraulic Press | hydraulic presses |
| 1,895,710 | Jan. 31, 1933 | H.F. MacMillin, W. Ernst | Hydraulic Press | hydraulic presses |
| 1,938,772 | Dec. 12, 1933 | H.R. Isler, H. Ernst | Hydraulic Drive for Milling Machines | hydraulic apparatus |
| 1,940,668 | Dec. 26, 1933 | W. Ernst | Hydraulic Press Surge Control | hydraulic presses |
| 1,956,758 | May 01, 1934 | W. Ernst | Hydraulic Press Operating Circuits | hydraulic presses |
| 2,005,732 | Jun. 25, 1935 | H. Ernst, B. Sassen | Balanced Pressure Hydraulic Circuit | hydraulic apparatus |
| 2,395,946 | Mar. 05, 1946 | G.A. Wahlmark | Mechanism for actuating machine tool supports | |
