| All Patents in class 72/64 |
Patents 1 -
8
of 8
      |
| Picture | Number | Date | Patentee | Title |
 | 12,583 | Mar. 27, 1855 | R. Cook | Machine for Turning the Lips of Augers |
 | 54,893 | May 22, 1866 | R.H. Boyd, W.W. Grier | Improved Machine for Making Auger Bits |
 | RE2,712 | Aug. 06, 1867 | R.H. Boyd, W.W. Grier | Improved Machine for Making Augers |
 | 146,212 | Jan. 06, 1874 | J. Swan | Improvement in Dies for Forming Auger-Bits |
| | 201,530 | Mar. 19, 1878 | C.F. Jacobson | Machine for Making Twist Drills |
 | 276,043 | Apr. 17, 1883 | G.G. Holley | Wringer-Plate for Twisting Augers |
 | 283,304 | Aug. 14, 1883 | W. Tucker | Machine for Twisting Auger-Bits |
| | 1,395,617 | Nov. 01, 1921 | W. Stubbs | Apparatus for Twisting Metal Bars |
