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| All Patents in class 81/437 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,624,222 | Jan. 06, 1953 | A.R. Joy | Plumber's Spud-Wrench | screw adjust wrenches | |
| 3,858,258 | Jan. 07, 1975 | P.S. Stevens | Multiple Hand Tool | wrench combination tools | |