| All Patents in class 81/475 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 1,684,231 | Sep. 11, 1928 | A. Levedahl | Stud driver | handheld power tool accessories |
| 1,732,038 | Oct. 15, 1929 | F. Schneider, E.L. Connell | Stud-setting machine | |
| 1,827,269 | Oct. 13, 1931 | G.E. Smith | Tool driving apparatus | handheld power tools |
| 1,855,456 | Apr. 26, 1932 | D.B. Miller | Power driven screw gun with clutch | handheld power tools |
| 1,858,276 | May 17, 1932 | D.B. Miller | Power driven screw gun with clutch | handheld power tools |
| 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 |
| 2,394,348 | Feb. 05, 1946 | G.C. Wilhide | Electric screw driver and nut runner | handheld power drivers |
| 2,409,545 | Oct. 15, 1946 | A.L. Cornwell | Torque Wrench | torque wrenches |
| 2,727,598 | Dec. 20, 1955 | W.G. Mitchell, F.A. Kaman | Impact wrench torque control | |
| 2,886,075 | May 12, 1959 | D.O. Skoog | Torque release clutch drive mechanism for power operated screw drivers and the like | handheld power tools |
| 3,012,456 | Dec. 12, 1961 | C.L. Dracka | Predetermined Torque Release Wrench | torque wrenches |
| 3,535,958 | Oct. 27, 1970 | K.R. Larson | Preset Torqueing Devices for Measured Fastener Turning | torque wrenches |
