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| All Patents in class 184/93 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 470,734 | Mar. 15, 1892 | F.D. Winkley | Oil-cup | |
 | 552,737 | Jan. 07, 1896 | F.D. Winkley | Oil-cup | |
 | 608,243 | Aug. 02, 1898 | F.D. Winkley | Oil-hole cover or cap | |
 | 642,860 | Feb. 06, 1900 | F.D. Winkley | Oil-hole cover or cap | |
 | 1,133,353 | Mar. 30, 1915 | C.F. Wray | Lubricator cup | |
| 1,475,703 | Nov. 27, 1923 | L. Kassander | Oil Cup | ||