| All Patents in class 76/2 |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| 851 | Jul. 24, 1838 | R.N. Watrous, E. L'Hommedieu | Machinery for manufacturing double-twist screw-augers | tool making machines |
| RE72 | Jul. 30, 1845 | E. L'Hommedieu | Improvement in machinery for manufacturing double-twist screw-augers | drill bits |
| 56,869 | Jul. 31, 1866 | R. Jennings | Improvements in Machinery for Swaging the Heads of Screw Augers | tool making machines |
| 76,955 | Apr. 21, 1868 | J. Swan | Improved Machine for Making Auger-Bits | making drills and augers |
| 78,769 | Jun. 09, 1868 | J. Swan | Machine for Upsetting Cook's Bits | making drills and augers |
| 100,816 | Mar. 15, 1870 | J. Swan | Machine for Upsetting Cook's Bits | making drills and augers |
| 116,509 | Jun. 27, 1871 | J. Swan | Improvement in machines for forming lips of auger-bits | tool making machines |
| RE4,516 | Aug. 15, 1871 | J. Swan | Machine for Upsetting Cook's Bits | making drills and augers |
| RE4,517 | Aug. 15, 1871 | J. Swan | Machine for Upsetting Cook's Bits | making drills and augers |
| RE4,569 | Sep. 26, 1871 | J. Swan | Improvement in Machinery for Forming the Lips of Augers | making drills and augers |
| 124,683 | Mar. 19, 1872 | W.A. Ives | Improvement in Machines for Forming Auger-Bits | tool making machines |
| 139,091 | May 20, 1873 | J. Swan | Improvement in Machines for Forming the Lips of Augers | |
| 141,401 | Jul. 29, 1873 | J. Swan | Improvement in Machines for Forming Auger-Bits | making drills and augers |
| RE5,624 | Oct. 21, 1873 | J. Swan | Machine for Upsetting Cook's Auger Bits | making drills and augers |
| 151,325 | May 26, 1874 | W. Tucker | Improvement in Machines for Forming Auger Bits | |
