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| All Patents in class 81/159 | |||||
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| Number | Date | Patentee | Title | Type | |
| 641,292 | Jan. 16, 1900 | W. Hinton | Wrench | pipe and nut combination wrenches | |
| 761,798 | Jun. 07, 1904 | F.E. Walden | Wrench or the Like | quick adjust wrenches | |
| 769,605 | Sep. 06, 1904 | F.E. Walden, R.A. Hammond | Wrench | quick adjust wrenches | |
| 776,944 | Dec. 06, 1904 | H.H. Muggley, J.E. Richards | Wrench | quick adjust wrenches | |
| 953,346 | Mar. 29, 1910 | J. Newbauer | Wrench | quick adjust wrenches | |