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| All Patents in class 417/502 | |||||
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| Number | Date | Patentee | Title | Type | |
| 861,213 | Jul. 23, 1907 | T.H. Homersham | Pump | piston pumps | |
| 1,990,263 | Feb. 05, 1935 | E.K. Benedek | Pump | hydraulic pumps | |
| 2,026,069 | Dec. 31, 1935 | H. Schneider | Engine Fuel Control Means | fuel injection apparatus | |