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| All Patents in class 184/25 | |||||
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| Number | Date | Patentee | Title | Type | |
| 259,322 | Jun. 13, 1882 | J. Leonard | Lubricator | steam engine lubricators | |
| 2,988,211 | Jun. 13, 1961 | F.J. Kent | Mandrel Lubricating Device | tool lubricators | |