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| All Patents in class 464/47 | |||||
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| Number | Date | Patentee | Title | Type | |
| 521,677 | Jun. 19, 1894 | G.H. Smith | Adjustable friction-clutch | drill presses | |
| 1,181,053 | Apr. 25, 1916 | C.O. Anderson | Friction Pulley | industrial machine pulleys and belt drive mechanisms | |
| 1,596,132 | Aug. 17, 1926 | L.M. Waite | Clutch mechanism | metal sawing machines | |
| 2,731,864 | Jan. 24, 1956 | W.C. Kothe, M.L. Kapin, J.W. Davies | Torque-Release Wrench | torque wrenches | |
| 2,841,724 | Jul. 01, 1958 | S.S. Brown | Mounting for garage door unit | ||