| All Patents in class 408/168 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
| | 79,198 | Jun. 23, 1868 | J. Brewer | Expanding Tap |
 | 79,276 | Jun. 23, 1868 | E. Sullivan | Reamer |
| | 157,034 | Nov. 17, 1874 | W.D. Squires | Machines for Enlarging the Bore of Gun-Barrels |
 | 198,945 | Jan. 08, 1878 | J.M. Johnson | Improvement in collapsible screw-taps |
| | 342,218 | May 18, 1886 | W. Miller | Expanding Reamer |
| | 415,846 | Nov. 26, 1889 | F.H. Richards | Screw Tapping Machine |
 | 484,813 | Oct. 25, 1892 | R.C. Nugent | Inside Calipers |
 | 763,816 | Jun. 28, 1904 | W. Vosper | Die for cutting taper threads |
 | 939,735 | Nov. 09, 1909 | W. Murchey | Thread-cutting tool |
| | 1,024,656 | Apr. 30, 1912 | I.W. Sprink | Boring Bar |
