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| All Patents in class 222/256 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,463,861 | Aug. 07, 1923 | F.D. Winkley | Lubricating apparatus | industrial machine lubrication | |
| 1,720,890 | Jul. 16, 1929 | D.F. Fesler | Lubricant Compressor | grease guns | |
| 2,436,701 | Feb. 24, 1948 | E.P. Sundholm | Grease Gun Head Construction | grease guns | |
| 2,886,215 | May 12, 1959 | V.G. Klein, O.C. Lyles, J.R. Graef | Lubricant Gun | grease guns | |