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| All Patents in class 184/31 | |||||
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| Number | Date | Patentee | Title | Type | |
| 644,149 | Feb. 27, 1900 | C.E. Sargent | Lubricating Device for Engines | internal combustion engine lubrication | |
| 894,423 | Jul. 28, 1908 | J.M. Chambers | Lubricator | oil cups | |