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| All Patents in class 81/DIG9 | |||||
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| Number | Date | Patentee | Title | Type | |
| 171,999 | Jan. 11, 1876 | W. Crumbie | Improvement in Pipe-Wrench or Tongs | pipe tongs | |
| 729,294 | May 26, 1903 | W.H. Downing | Tubing Tongs | pipe tongs | |