| All Patents in class 91/498 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
| | 137,261 | Mar. 25, 1873 | H. Taylor | Rotary Steam Engines |
 | 1,385,134 | Jul. 19, 1921 | F.A. Jimerson | Bit-chuck retainer |
 | 1,566,095 | Dec. 15, 1925 | F.A. Jimerson | Fluid-actuated rotary machine |
 | 1,566,096 | Dec. 15, 1925 | F.A. Jimerson | Reversible throttle handle |
| | 1,818,611 | Aug. 11, 1931 | W. Ernst | Radial Pump |
| | 1,920,123 | Jul. 25, 1933 | W. Ernst | Radial Pump |
| | 2,021,353 | Nov. 19, 1935 | W. Ernst | Hydraulic Pump or Motor |
| | 2,021,354 | Nov. 19, 1935 | W. Ernst | External Adjustment for Hydraulic Pump Bearings |
| | 2,164,888 | Jul. 04, 1939 | F.S. Haas, H. Ernst, B. Sassen | Variable Delivery Pump |
 | 2,442,635 | Jun. 01, 1948 | R.D. Bennett | Spline or gear grinder |
