| All Patents in class 81/451 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 108,377 | Oct. 18, 1870 | G.H. Miller | Combined Tool | combination tools |
| 145,506 | Dec. 16, 1873 | S.R. Kneeland | Improvement in Screwdrivers | screwdriver blades |
| 147,654 | Feb. 17, 1874 | S.R. Kneeland | Improvement in Screwdriver blades | screwdriver blades |
| 198,935 | Jan. 08, 1878 | W.L. Gilchrist | Improvement in screw drivers | screwdriver blades |
| 486,395 | Nov. 15, 1892 | W.M. Carr | Screw Driver | screwdriver mechanisms |
| 768,441 | Aug. 23, 1904 | T.W. Fisher | Screw Gripping Screwdriver | screwdriver blades |
| 909,723 | Jan. 12, 1909 | S.H. Wiesedeppe | Screw holding screwdriver | screwdriver blades |
| 1,318,088 | Oct. 07, 1919 | C.S. Klein | Combination Tool | socket wrenches |
| 1,564,342 | Dec. 08, 1925 | O.P. Wodack, J.J. Bebhardt | Portable power-driven tool | handheld power drivers |
| 2,782,823 | Feb. 26, 1957 | D.E. Williams, Jr. | Magnetic screw driver | screwdriver bits and holders |
| 4,970,922 | Nov. 20, 1990 | B. Krivec | Torque Driving Tool and Retainer for Driven Member | |
