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| All Patents in class 81/337 | |||||
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| Number | Date | Patentee | Title | Type | |
| 598,487 | Feb. 01, 1898 | P. Quarelli | Monkey Wrench | quick adjust wrenches | |
| 618,571 | Jan. 31, 1899 | C.L. Henderson | Wrench | quick adjust wrenches | |
| 1,426,553 | Aug. 22, 1922 | A. Cruickshank | Pliers | pliers | |
| 1,561,833 | Nov. 17, 1925 | A. Cruickshank | Plier Wrench | pliers | |