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| All Patents in class 81/90.6 | |||||
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| Number | Date | Patentee | Title | Type | |
| 729,294 | May 26, 1903 | W.H. Downing | Tubing Tongs | pipe tongs | |
| 1,053,931 | Feb. 18, 1913 | G.F. Lebus, W.R. Osborne | Well Drill Wrench | pipe tongs | |