| All Patents of Type: screwdriver mechanisms |
Patents 16 -
30
of 43
      |
| Number | Date | Patentee | Title | Type |
| 729,004 | May 26, 1903 | L.S. Starrett | Screw-Driver | screwdriver mechanisms |
| 750,182 | Jan. 19, 1904 | Z.T. Furbish | Reversible Screw-Driver | screwdriver mechanisms |
| 872,048 | Nov. 26, 1907 | W. Broad | Single Crank Screwdriver | screwdriver mechanisms |
| 873,771 | Dec. 17, 1907 | J. McCoy | Bench screwdriver | screwdriver mechanisms |
| 1,239,847 | Sep. 11, 1917 | G. Townill | Universal Screw-Driver | screwdriver mechanisms |
| 1,398,234 | Nov. 29, 1921 | H.A. Landis | Variable Angle Screwdriver | screwdriver mechanisms |
| 1,441,950 | Jan. 09, 1923 | H. Simon | Simore Lightning Change | screwdriver mechanisms |
| 1,448,895 | Mar. 20, 1923 | H.A. Yotta | Tool | screwdriver mechanisms |
| 1,540,749 | Jun. 09, 1925 | A.A. Beach | Screw Driving Device | screwdriver mechanisms |
| 1,558,763 | Oct. 27, 1925 | A.L. Rossberg | Angularly-Adjustable Tool Holder | screwdriver mechanisms |
| 1,635,437 | Jul. 12, 1927 | J. Ryan | Offset Tool Holder | screwdriver mechanisms |
| 1,642,569 | Sep. 13, 1927 | B. Reader, F.H. Winslow | Hand Tool | screwdriver mechanisms |
| 1,752,703 | Apr. 01, 1930 | H.E. Simson | Hand Drill or Screw Driver | screwdriver mechanisms |
| 2,206,364 | Jul. 02, 1940 | J.N. Petre | Screw Driver Attachment | screwdriver mechanisms |
| 2,378,775 | Jun. 19, 1945 | A.T. Johnson | Screw Driver | screwdriver mechanisms |
