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| All Patents in class 73/862.641 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,211,401 | Aug. 13, 1940 | H.W. Zimmerman | Torque measuring wrench | torque wrenches | |
| 2,381,988 | Aug. 14, 1945 | W.H. Shortell | Pressure indicator for hack saws | metal sawing machines | |