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| All Patents in class 81/57.5 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,713,527 | May 21, 1929 | O.E. Furst | Multiple Socket Wrench | brace wrenches | |
| 1,723,033 | Aug. 06, 1929 | S.W. Hartley | Brace Wrench | brace wrenches | |