| All Patents in class 60/380 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 1,711,378 | Apr. 30, 1929 | W. Ernst | Control Mechanism for Hydraulic Presses | hydraulic presses |
| 1,746,419 | Feb. 11, 1930 | W. Ernst | Control Mechanism for Hydraulic Presses | hydraulic presses |
| 1,870,500 | Aug. 09, 1932 | H.F. MacMillin, 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 |
| 1,940,668 | Dec. 26, 1933 | W. Ernst | Hydraulic Press Surge Control | hydraulic presses |
| 1,978,016 | Oct. 23, 1934 | W. Ernst | Control Apparatus for Pumps | hydraulic pump controls |
| 2,000,420 | May 07, 1935 | L.L. Schauer, A.M. Sosa, J.H. McKewen | Hydraulic transmission system | radial drill presses |
| 2,085,303 | Jun. 29, 1937 | H. Ernst | Hydraulic Circuit Control Mechanism | hydraulic apparatus |
| 2,365,748 | Dec. 26, 1944 | F.W. Curtis | Hydraulic Circuit | milling machines |
| 2,921,437 | Jan. 19, 1960 | E.J. Svenson | Material Working Apparatus | metalworking machine mechanisms |
| 3,039,441 | Jun. 19, 1962 | A.F. Hurlburt, J.G. Padelt | Photographic Camera | cameras |
| 3,060,690 | Oct. 30, 1962 | H. Horlacher | Control Mechanism for Machine Tool Table Feed | milling machines |
