| All Patents in class 81/451 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
 | 108,377 | Oct. 18, 1870 | G.H. Miller | Combined Tool |
 | 145,506 | Dec. 16, 1873 | S.R. Kneeland | Improvement in Screwdrivers |
 | 147,654 | Feb. 17, 1874 | S.R. Kneeland | Improvement in Screwdriver blades |
 | 198,935 | Jan. 08, 1878 | W.L. Gilchrist | Improvement in screw drivers |
 | 486,395 | Nov. 15, 1892 | W.M. Carr | Screw Driver |
 | 768,441 | Aug. 23, 1904 | T.W. Fisher | Screw Gripping Screwdriver |
 | 909,723 | Jan. 12, 1909 | S.H. Wiesedeppe | Screw holding screwdriver |
 | 1,318,088 | Oct. 07, 1919 | C.S. Klein | Combination Tool |
 | 1,564,342 | Dec. 08, 1925 | O.P. Wodack, J.J. Bebhardt | Portable power-driven tool |
 | 2,782,823 | Feb. 26, 1957 | D.E. Williams, Jr. | Magnetic screw driver |
