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