| All Patents in class 72/376 |
Patents 1 -
6
of 6
      |
| Picture | Number | Date | Patentee | Title |
 | 55,498 | Jun. 12, 1866 | R. Jennings | Improvement in Dies for Swaging the Ends of Auger Blanks |
 | 68,012 | Aug. 20, 1867 | J. Swan | Manufacture of Single Twist Augers |
 | 418,631 | Dec. 31, 1889 | A. Weed | Forming articles of metal |
 | 846,113 | Mar. 05, 1907 | A. Krieger | Manufacture of single-spiral augers |
 | 1,118,073 | Nov. 24, 1914 | W.S. Thomson | Process of Making Threaded Tool Members and Blanks for the Same |
 | 3,739,664 | Jun. 19, 1973 | J.E. Swanstrom, Jr. | Tools and Machine Parts and Methods from Inverse Draft Forging |
