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| Patents for Rudolph W. Lotz | |||||
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| Number | Date | Patentee | Title | Type | |
| 487,829 | Dec. 13, 1892 | W.R. England | Pipe-Coupling | auxiliary wrenches | |
| 493,062 | Mar. 07, 1893 | D. Bruno | Trammel Point | trammels | |