| All Patents in class 74/424.75 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 57,282 | Aug. 21, 1866 | T. Bowers | Improvement in Wooden Screws | |
| 201,372 | Mar. 19, 1878 | J.B. West | Improvement in screw-drivers | spiral screwdrivers |
| 470,176 | Mar. 08, 1892 | F.P. Burkhardt | Mechanical movement | spiral screwdrivers |
| 699,013 | Apr. 29, 1902 | J.M. Rauhoff | Mechanism for converting motion | |
| 1,389,565 | Aug. 30, 1921 | J. Jensen | Machine element | metal punching machines |
| 1,409,844 | Mar. 14, 1922 | H. Gartelman | Valve Grinding Tool | valve grinding tools |
| 1,897,666 | Feb. 14, 1933 | F.O. Hoagland | Machine Tool Spindle | metalworking power transmission |
| 1,989,611 | Jan. 29, 1935 | B. Sassen, A.H. Dall | Wave Screw | metalworking power transmission |
| 2,230,716 | Feb. 04, 1941 | F.W. Curtis | Table Drive for Milling Machines | milling machines |
| 2,565,628 | Aug. 28, 1951 | P.F. Ravilious | Differential Screw Adjustment | metalworking machines |
| 3,121,340 | Feb. 18, 1964 | M.L. Anthony | Resilient Nut for Averaging Out Lead Screw Error | metalworking machine mechanisms |
| 3,789,896 | Feb. 05, 1974 | E. Cooke-Yarborough | Screw drivers and like tools | spiral screwdrivers |
