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| All Patents in class 417/203 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,101,493 | Jun. 23, 1914 | C.R. Houghton | Combination-pump | water pumps | |
| 2,769,393 | Nov. 06, 1956 | J.S. Cardillo, M.M. Hann | Hydraulic pump and control | ||