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| All Patents in class 72/227 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,430,368 | Nov. 04, 1947 | J.J. Reardon | Apparatus and Method for Drawing and Broaching Socket Wrenches | making wrenches | |
| 3,138,982 | Jun. 30, 1964 | C.L. Sporck | Strip Rolling Method | sheet metal forming rolls | |