| All Patents in class 91/443 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
 | 50,320 | Oct. 10, 1865 | J.M. Albertson | Improvement in cut-off valves |
 | 640,504 | Jan. 02, 1900 | E.E. Thomas | Steam log-turner |
 | 694,780 | Mar. 04, 1902 | C.S. Prescott | Steam set-works |
 | 1,244,664 | Oct. 30, 1917 | H.E. Warren | Fluid-operated lathe |
| | 1,537,437 | May 12, 1925 | G. Graffinberger | Trimmer-saw mechanism |
| | 2,139,173 | Dec. 06, 1938 | E.G. Roehm, M. Romaine | Control Circuit for Broaching Machines |
| | 2,286,880 | Jun. 16, 1942 | W.A. Traut | Hydraulic Control System |
| | 2,444,474 | Jul. 06, 1948 | B.R. Purvin | Fluid pressure device |
 | 2,454,235 | Nov. 16, 1948 | E.J. Tomek | Drilling machine |
| | 2,496,756 | Feb. 07, 1950 | E.Y. Seborg | Control system for hydraulically driven machine tool elements |
