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| All Patents in class 137/625.17 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,463,861 | Aug. 07, 1923 | F.D. Winkley | Lubricating apparatus | industrial machine lubrication | |
| 2,166,940 | Jul. 25, 1939 | C.M. Conradson | Hydraulic Power System | machine tool controls | |
| 2,686,650 | Aug. 17, 1954 | W.I. Evans | Hydraulic Tracing Mechanism | profiling machines | |
| 3,308,849 | Mar. 14, 1967 | P.R. Bohart | Valve for Dual Motor Control | hydraulic apparatus | |