| All Patents in class 408/169 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
 | 48,548 | Jul. 04, 1865 | F. Gleason | Improved Expanding Drill |
 | 79,276 | Jun. 23, 1868 | E. Sullivan | Reamer |
| | 122,243 | Dec. 26, 1871 | J. Flower | Improvement in Boring Bars for Facing the Ends of Cylinders |
| | 184,097 | Nov. 07, 1876 | J.W. Melvin | Screw-Tap |
| | 330,999 | Nov. 24, 1885 | R.C. Nugent | Screw Tap |
 | 716,439 | Dec. 23, 1902 | J.N. Lapointe | Reamer |
 | 1,356,867 | Oct. 26, 1920 | V.R. Koontz | Collapsible tap |
| | 1,960,319 | May 29, 1934 | O. Severson | Expansion Reamer |
| | 2,206,941 | Jul. 09, 1940 | S.A. Cogsdill | Reamer |
| | 3,730,636 | May 01, 1973 | S. Mizoguchi | Boring Head |
