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| Patents for Harold F. Shepherd | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,165,028 | Dec. 21, 1915 | H.F. Shepherd | Water and Feed Pump for Hydrocarbon Engines | fuel pumps | |
| 1,258,156 | Mar. 05, 1918 | H.F. Shepherd | Hot Plate Apparatus for Explosive Engines and the Like | ignition systems | |
| 1,485,890 | Mar. 04, 1924 | H.F. Shepherd | Hot Plug | ignition systems | |