| All Patents in class 91/505 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 924,787 | Jun. 15, 1909 | R. Janney | Variable Speed Transmission Device | industrial machine speed and direction changing mechanisms |
| 925,148 | Jun. 15, 1909 | H.D. Williams | Variable Speed Gear | industrial machine speed and direction changing mechanisms |
| 1,722,832 | Jul. 30, 1929 | D.H. West | Hydraulic transmission | hydraulic pumps |
| 1,945,391 | Jan. 30, 1934 | E. Benedek | Pump | hydraulic pumps |
| 2,015,423 | Sep. 24, 1935 | R.E. Flanders | Hydraulic Pump or Motor | hydraulic apparatus |
| 2,520,632 | Aug. 29, 1950 | J. Greenhut | Hydraulic pump or motor | |
