| All Patents in class 91/390 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 646,458 | Apr. 03, 1900 | H.A. Pedrick | Pneumatic Hoisting Apparatus | hoists, winches, come-alongs |
| 675,112 | May 28, 1901 | R.A. Rutherford | Pneumatic Hoisting Apparatus | hoists, winches, come-alongs |
| 675,528 | Jun. 04, 1901 | R.A. Rutherford | Valve Device for Pneumatic Hoists | industrial valves |
| 702,979 | Jun. 24, 1902 | G.E. Martin | Pneumatic Hoist | hoists, winches, come-alongs |
| 2,775,235 | Dec. 25, 1956 | W.F. Jessup | Booster for Template Controlled Truing Mechanism | grinder dressers |
| 3,077,132 | Feb. 12, 1963 | C.H. Whitmore | Feed control for band saws | metal cutting bandsaws |
| 3,913,450 | Oct. 21, 1975 | R. MacGregor | Hydraulic control system for press brakes or the like | sheet metal brakes |
