| All Patents in class 91/470 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 245,775 | Aug. 16, 1881 | B. Brazelle | Steam-engine | steam engines |
| 495,282 | Apr. 11, 1893 | C. Vogel | Valve for Steam Engines | steam engine valves |
| 702,979 | Jun. 24, 1902 | G.E. Martin | Pneumatic Hoist | hoists, winches, come-alongs |
| 856,569 | Jun. 11, 1907 | A.D. Catlin | Steam Feed Valve | steam valves |
| 1,446,547 | Feb. 27, 1923 | J.M. Crowe | Valve for pneumatic tools | pneumatic tools |
| 1,987,186 | Jan. 08, 1935 | R.E. Flanders | Hydraulic Transmission | hydraulic apparatus |
| 2,166,940 | Jul. 25, 1939 | C.M. Conradson | Hydraulic Power System | machine tool controls |
| 2,328,061 | Aug. 31, 1943 | F.W. Curtis | Hydraulic Vise | milling machine accessories |
