| Patents for Frank D. Winkley |
Patents 1 -
10
of 23
      |
| Picture | Number | Date | Patentee | Title |
| | 391,571 | Oct. 23, 1888 | F.D. Winkley | Windmill |
| | 463,088 | Nov. 10, 1891 | F.D. Winkley | Filling attachment |
 | 470,734 | Mar. 15, 1892 | F.D. Winkley | Oil-cup |
| | 492,451 | Feb. 28, 1893 | F.D. Winkley | Grinding apparatus |
 | 523,254 | Jul. 17, 1894 | F.D. Winkley | Oil-can |
 | 608,243 | Aug. 02, 1898 | F.D. Winkley | Oil-hole cover or cap |
 | 608,244 | Aug. 02, 1898 | F.D. Winkley | Oil-hole cover or cap |
 | 642,860 | Feb. 06, 1900 | F.D. Winkley | Oil-hole cover or cap |
 | 865,221 | Sep. 03, 1907 | F.D. Winkley | Lubricator |
| | 925,147 | Jun. 15, 1909 | F.D. Winkley | Pump |
