| All Patents of Type: hydraulic machinery |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 87X | Oct. 29, 1794 | J. Hathaway | Improvement in Hydraulics | hydraulic machinery |
| 5,974X | Oct. 01, 1830 | R. McCormick | Hydraulic machinery | hydraulic machinery |
| 79,710 | Jul. 07, 1868 | S.K. Wellman | Hydraulic Jack | cranes |
| 1,412,069 | Apr. 11, 1922 | F.E. Stevenson | Automatic Control for Hydraulic Pumps | hydraulic machinery |
| 1,870,499 | Aug. 09, 1932 | W. Ernst | Hydraulically Operated Drop Hammer | drop hammers |
| 1,877,102 | Sep. 13, 1932 | F.N. Whitesell | Hydraulic Control Means | hoists, winches, come-alongs |
| 2,112,141 | Mar. 22, 1938 | H.C. Clay | Hydraulic Control for Variable Speed Transmissions | industrial machine speed and direction changing mechanisms |
| 2,295,161 | Sep. 08, 1942 | H.C. Clay | Hydraulic Control Mechanism | hydraulic machinery |
| 2,306,541 | Dec. 29, 1942 | H.C. Clay | Floating Hydraulic Control | hydraulic machinery |
| 2,417,217 | Mar. 11, 1947 | H. Schreck | Fluid Flow Control Device | hydraulic machinery |
| GB-798,414 | Jul. 23, 1958 | E.G. Jager | Improvements in Control Mechanism for Hydraulically Operated Equipment | hydraulic machinery |
