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| All Patents in class 222/259 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,475,980 | Dec. 04, 1923 | O. Zerk | Lubricating Apparatus | grease guns | |
| 4,555,047 | Nov. 26, 1985 | H.E. Ackley | Automatic Toolchanger Tapping Lubricant Dispenser | metalworking machine lubrication | |