| All Patents in class 144/92 |
Patents 1 -
10
of 49
      |
| Picture | Number | Date | Patentee | Title |
| | 8,877X | Jun. 12, 1835 | W. Jones | Auger |
 | 57,536 | Aug. 28, 1866 | J. McCrum | Drilling attachment for turning-lathes |
 | 58,568 | Oct. 09, 1866 | R. Allison | Improvement in boring-machines |
 | 68,362 | Sep. 03, 1867 | W.D. Grimshaw | Improved drilling machine |
| | 79,000 | Jun. 16, 1868 | G. Raft | Wrist-Pin Turner |
 | 97,908 | Dec. 14, 1869 | G.A. Gray, Jr. | Improved radial drilling-machine |
 | 101,466 | Apr. 05, 1870 | J.E. Hunter | Improved hand drilling-machine |
 | 105,930 | Aug. 02, 1870 | V. Foland | Improvement in traversing machine |
 | 123,886 | Feb. 20, 1872 | W. Gardam, J. Gardam | Improvement in drilling-machines |
 | 124,647 | Mar. 12, 1872 | J. Wheelock | Improvement in Boring-Mills |
