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All Patents in class 73/862.641 | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 2,211,401 | Aug. 13, 1940 | H.W. Zimmerman | Torque measuring wrench | |
2,381,988 | Aug. 14, 1945 | W.H. Shortell | Pressure indicator for hack saws |