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| All Patents in class 81/178 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,464,004 | Aug. 07, 1923 | G.W. Kelley | Wrench | quick adjust wrenches | |
| 1,787,787 | Jan. 06, 1931 | W.C. Kress | Pipe Vise | pipe and chain vises | |
| 5,209,144 | May 11, 1993 | G. Lu | Dual-Purpose Quickly Adjustable Wrench | pipe and nut combination wrenches | |