| All Patents in class 74/124 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 300,734 | Jun. 17, 1884 | G.H. Preston | Device for changing speed | industrial machine mechanisms |
| 402,538 | Apr. 30, 1889 | C.H. Olson | Tool-driver | spiral screwdrivers |
| 1,080,309 | Dec. 02, 1913 | W. Vollmer | Metal Bending Machine | metal bending machines |
| 1,563,178 | Nov. 24, 1925 | G.O. Leopold, T.J. Fegley | Ratchet tool | |
| 1,762,315 | Jun. 10, 1930 | D.B. Swain, H.A. Ryther | Ratchet screw driver | spiral screwdrivers |
| 1,938,785 | Dec. 12, 1933 | B. Sassen | Transmission Mechanism | metalworking power transmission |
