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| All Patents in class 60/639 | |||||
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| Number | Date | Patentee | Title | Type | |
| FX-6,145 | Oct. 01, 1830 | R. McCormick | Hydraulic machinery | piston pumps | |
| 467,840 | Jan. 26, 1892 | J.C. Walker | Water Wheel | turbine water wheels | |
| 515,674 | Feb. 27, 1894 | J.J. Guldhaug | Motor | hydraulic motors | |
| 924,808 | Jun. 15, 1909 | F.W. Mackey | Water Motor | hydraulic motors | |