| Patents for Hydraulic Press Mfg. Co. |
Patents 31 -
45
of 73
      |
| Number | Date | Patentee | Title | Type |
| 1,778,803 | Oct. 21, 1930 | L.S. Hubbert | Hydraulic Plastic Press | hydraulic presses |
| 1,799,140 | Mar. 31, 1931 | H.F. MacMillin, E.R. Darling | Manufacture of Pectin Solution From Apple Pomace | making pectin |
| 1,818,611 | Aug. 11, 1931 | W. Ernst | Radial Pump | hydraulic pumps |
| 1,819,703 | Aug. 18, 1931 | W. Ernst | Valve | hydraulic motor controls |
| 1,847,073 | Mar. 01, 1932 | W. Ernst | Hydraulic Press | hydraulic presses |
| 1,851,622 | Mar. 29, 1932 | W. Ernst | Valve Mechanism for Hydraulic Presses | hydraulic presses |
| 1,861,116 | May 31, 1932 | W. Ernst | Control Mechanism for Pumps | hydraulic pump controls |
| 1,861,337 | May 31, 1932 | W. Ernst | Hydraulic Metal Drawing Press | hydraulic metalworking presses |
| 1,867,972 | Jul. 19, 1932 | C.J. Zube, L.S. Hubbert | Press for Manufacturing Molded Articles | hydraulic presses |
| 1,870,499 | Aug. 09, 1932 | W. Ernst | Hydraulically Operated Drop Hammer | drop hammers |
| 1,870,500 | Aug. 09, 1932 | H.F. MacMillin, W. Ernst | Hydraulic Press | hydraulic presses |
| 1,870,501 | Aug. 09, 1932 | W. Ernst | Plural Pressure Pump Control for Hydraulic Presses | hydraulic pump controls |
| 1,876,833 | Sep. 13, 1932 | E. Benedek | Pump | hydraulic pumps |
| 1,884,060 | Oct. 25, 1932 | H.F. MacMillin | Hydraulic Press | hydraulic presses |
| 1,891,121 | Dec. 13, 1932 | R. Thoreson | Drawing Press or the Like | hydraulic metalworking presses |
