| All Patents in class 91/497 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 1,621,495 | Mar. 22, 1927 | C.M. Conradson | Rotary Pump |
| | 1,818,611 | Aug. 11, 1931 | W. Ernst | Radial Pump |
| | 1,964,244 | Jun. 26, 1934 | E.K. Benedek | Variable Delivery Radial Pump |
| | 2,006,880 | Jul. 02, 1935 | E.K. Benedek | High Pressure Radial Piston Hydraulic Pump or Motor |
| | 2,023,216 | Dec. 03, 1935 | E.K. Benedek | Variable Delivery Pump or Motor |
| | 2,164,888 | Jul. 04, 1939 | F.S. Haas, H. Ernst, B. Sassen | Variable Delivery Pump |
 | 2,381,741 | Aug. 07, 1945 | C.E. Grosser | Pump or motor unit |
