| All Patents in class 74/22R |
Patents 16 -
30
of 36
      |
| Number | Date | Patentee | Title | Type |
| 1,849,868 | Mar. 15, 1932 | S. Einstein | Grinder Wheel Oscillator | grinder dressers |
| 1,862,834 | Jun. 14, 1932 | M.O. Trudeau | Grinding Machine | grinding machines |
| 1,862,850 | Jun. 14, 1932 | H. Fritschi | Grinding Machinery | grinding machines |
| 1,945,391 | Jan. 30, 1934 | E. Benedek | Pump | hydraulic pumps |
| 2,000,271 | May 07, 1935 | E.K. Benedek | Variable Delivery Pump or Motor | hydraulic pumps |
| 2,006,880 | Jul. 02, 1935 | E.K. Benedek | High Pressure Radial Piston Hydraulic Pump or Motor | hydraulic pumps |
| 2,023,216 | Dec. 03, 1935 | E.K. Benedek | Variable Delivery Pump or Motor | hydraulic pumps |
| 2,024,420 | Dec. 17, 1935 | E.K. Benedek | Pump | hydraulic pumps |
| 2,032,079 | Feb. 25, 1936 | E.K. Benedek | Pump or Motor | oil hydraulic motors |
| 2,083,194 | Jun. 08, 1937 | A.M. Johnson | Honing machine | honing machines |
| 2,176,316 | Oct. 17, 1939 | F.A. Swanson | Honing machine | honing machines |
| 2,242,781 | May 20, 1941 | V.W. Gideon | Grinding Machine | grinding machines |
| 2,369,345 | Feb. 13, 1945 | B.E. Folke | Hydraulic Pump | hydraulic pumps |
| 2,420,984 | May 20, 1947 | R.H. Shepard | Hydraulic Pump | hydraulic pumps |
| 2,436,492 | Feb. 24, 1948 | R.H. Shepard | Pumping Units for Mechanical Lubricators | industrial machine lubrication |
