| All Patents in class 76/3 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 66,297 | Jul. 02, 1867 | E. Carrington, E.O. Carrington | Improved machine for cutting down augers | tool making machines |
| 117,594 | Aug. 01, 1871 | C.W. Beals | Improvement in Devices for Resetting Old Auger-Bits | drill accessories |
| 133,238 | Nov. 19, 1872 | W.P. Maxson | Machine for Finishing the Lips & Points of Augers | making drills and augers |
| 195,963 | Oct. 09, 1877 | G.R. Stetson | Improvement in machines for clearing twist-drills | making drills and augers |
| 209,782 | Nov. 12, 1878 | J. Swan | Improvement in the Manufacture of Auger-Bits | making drills and augers |
| 302,527 | Jul. 22, 1884 | J. Swan | Machine for Milling Augers | making drills and augers |
| 303,239 | Aug. 05, 1884 | J. Swan | Mechanism for Manufacturing Augers | making drills and augers |
| 307,074 | Oct. 21, 1884 | J. Swan | Tool for Cutting the Floor-Lip and Cutting-Spur of Auger-Bits | making drills and augers |
| 313,456 | Mar. 03, 1885 | J. Swan | Machine for the Manufacture of Auger-Bits | making drills and augers |
| 333,689 | Jan. 05, 1886 | G.R. Stetson | Machine for Clearing Twist Drills | making drills and augers |
| 387,188 | Jul. 31, 1888 | J. Swan | Machine for Cutting Floor-Lips and Spurs on Augers and Bits | making drills and augers |
| 486,239 | Nov. 15, 1892 | A.U. Smith | Machine for Shaping Auger-Heads | making drills and augers |
| 1,825,007 | Sep. 29, 1931 | N.F. McNaught | Valve seat reconstruction tool | |
