| All Patents in class 137/625.43 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 114,078 | Apr. 25, 1871 | P.N. Woods | Improvement in valves and steam-chests for engines | |
| 1,446,547 | Feb. 27, 1923 | J.M. Crowe | Valve for pneumatic tools | pneumatic tools |
| 1,687,369 | Oct. 09, 1928 | F.J. Lapointe | Hydraulic broaching machine | broaching machines |
| 2,170,304 | Aug. 22, 1939 | C. Herfurth | Truing Attachment | grinding machines |
| 2,474,134 | Jun. 21, 1949 | A.P. Waterson | Hydraulic Tool Control Unit | metalworking machine mechanisms |
| 2,600,746 | Jun. 17, 1952 | W. Ernst | Fluid Pressure Control Valve | hydraulic apparatus |
