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| All Patents in class 81/105 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,629,895 | May 24, 1927 | M.J. Tully | Double Wrench | pipe wrenches | |
| 1,760,544 | May 27, 1930 | F.H. Dickson | Wrench | pipe wrenches | |
| 2,051,755 | Aug. 18, 1936 | W.O. Thewes | Pipe Wrench | pipe wrenches | |
| 2,076,830 | Apr. 13, 1937 | W.O. Thewes | Pipe Wrench | pipe wrenches | |
| 2,377,612 | Jun. 05, 1945 | G.H. Clark | Wrench | pipe wrenches | |