| All Patents in class 74/424.71 |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 253,266 | Feb. 07, 1882 | S. Darling | Screw Nut | nut or bolt making machines |
| 255,011 | Mar. 14, 1882 | A.W. Norton | Lathe | backing off attachments |
| 272,480 | Feb. 20, 1883 | H.A. Rowland | Apparatus for Grinding Screws | grinding fixtures |
| 2,317,060 | Apr. 20, 1943 | W.G. Hoelscher | Safety Device for Radial Drill Arm Elevating Screws | metalworking machine mechanisms |
| 2,703,498 | Mar. 08, 1955 | C. Tree | Removable Feed Nut for the Cross-Feed Apparatus of Milling Machines | milling machines |
