| All Patents in class 192/56.61 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 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 |
| 2,446,363 | Aug. 03, 1948 | E.W. Daum | Combination positive clutch and torque responsive friction coupling | handheld power tools |
| 2,522,206 | Sep. 12, 1950 | J.B. Armitage | Transmission Control Mechanism | milling machines |
| 2,753,965 | Jul. 10, 1956 | F.A. Kaman | Impact tools | |
| 3,788,158 | Jan. 29, 1974 | A.J. Firth | Trip Device for Use in a Feed Mechanism of a Machine | metalworking machine mechanisms |
