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| All Patents in class 72/334 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,711,083 | Apr. 30, 1929 | A.O. Brungardt | Process of Making Wrenches | pipe wrenches | |
| 2,182,922 | Dec. 12, 1939 | E.A. Heschel | Method of Producing a Socket Wrench Head | wrench sockets | |