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| All Patents in class 417/456 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,208,259 | Dec. 12, 1916 | A. Winton | Fuel Feed for Internal Combustion Motors | fuel systems | |
| 1,719,693 | Jul. 02, 1929 | H. Ernst | Variable Displacement Pump | hydraulic pumps | |