| All Patents in class 464/39 |
Patents 1 -
10
of 10
      |
| Number | Date | Patentee | Title | Type |
| 421,178 | Feb. 11, 1890 | W. Lewis | Machinery for Transmitting and Arresting Motion | clutches |
| 504,479 | Sep. 05, 1893 | E.W. Ross | Safety driving mechanism | industrial machine mechanisms |
| 521,677 | Jun. 19, 1894 | G.H. Smith | Adjustable friction-clutch | drill presses |
| 950,635 | Mar. 01, 1910 | H.L. Johnston | Driving mechanism | coffee mills |
| 1,035,547 | Aug. 13, 1912 | A.L. De Leeuw | Emergency Clutch | milling machines |
| 1,684,633 | Sep. 18, 1928 | A. Levedahl | Screw or nut driving device for portable power-driven rotary tools | handheld power tools |
| 2,225,091 | Dec. 17, 1940 | G.C. Wilhide | Portable power driven screw or bolt driving and nut running machine | handheld power drills |
| 2,293,786 | Aug. 25, 1942 | E.C. Worden | Wrench | torque wrenches |
| 2,293,787 | Aug. 25, 1942 | E.C. Worden | Torque Wrench | torque wrenches |
| 2,743,638 | May 01, 1956 | R.G. Woods | Torque-Limiting Wrench | torque wrenches |
