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| All Patents in class 137/541 | |||||
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| Number | Date | Patentee | Title | Type | |
| 832,265 | Oct. 02, 1906 | C.W. Manzel | Lubricating Device | tool lubricators | |
| 2,505,992 | May 02, 1950 | H.W. Webb, F.F. Rike | Valve | ||