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| All Patents in class 417/569 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,895 | Dec. 31, 1842 | W. Douglas, B. Douglas | Pump | household hand pumps | |
| 23,649 | Apr. 12, 1859 | W. Douglas, B. Douglas | Pump | household hand pumps | |
| 2,444,159 | Jun. 29, 1948 | L.E. Godfriaux | Fluid Pump | reciprocating pumps | |