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| Patents for David P. Davies | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,819,640 | Aug. 18, 1931 | D.P. Davies | Tractor | tractors | |
| 1,849,284 | Mar. 15, 1932 | D.P. Davies | Tractor | tractors | |
| 1,871,306 | Aug. 09, 1932 | D.P. Davies | Power Trasmission for Agricultural Machines | power takeoffs | |
| 2,068,536 | Jan. 19, 1937 | D.P. Davies | Pump | centrifugal pumps | |
| 2,334,146 | Nov. 09, 1943 | D.P. Davies | Turbulence Cylinder Head | cylinder heads | |