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| All Patents in class 73/862.31 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,920,082 | Nov. 18, 1975 | E.C. Dudek | Power tool with torque sensing control means | ||
| 4,281,538 | Aug. 04, 1981 | E.C. Dudek | Transducer for indicating torque | ||