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| All Patents in class 184/91 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 978,521 | Dec. 13, 1910 | V.J. Wahlstrom | Oil-cup | |
| 1,258,876 | Mar. 12, 1918 | S.G. Croker | Charging Means for Grease Cups | ||
| 3,020,979 | Feb. 13, 1962 | H.A. Andresen | Oil Cup Device | ||
| 3,028,930 | Apr. 10, 1962 | H.A. Andresen | Oil Cup and Cover | ||
| 3,120,879 | Feb. 11, 1964 | D.J. Warner | Oil Cup With Integral Spring | ||