| All Patents in class 221/239 |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 246,933 | Sep. 13, 1881 | S.L. Worsley | Machine for Feeding Screw Blanks | metal threading machines |
| 489,547 | Jan. 10, 1893 | R.J. Shipley | Punching and riveting machine | metal punching machines |
| 953,752 | Apr. 05, 1910 | A.H. Neureuther | Automatic Pinion Cutting Machine | gear making machines |
| 1,835,591 | Dec. 08, 1931 | E.P. Bullard | Automatic Work Feeding and Chucking Means for Multiple Spindle Lathes | |
| 2,796,616 | Jun. 25, 1957 | R.L. Leinweber | Autoamtic Transfer Mechanism for Forging Machines and the Like | workpiece changers and storage mechanisms |
