| All Patents in class 408/197 |
Patents 1 -
10
of 20
      |
| Picture | Number | Date | Patentee | Title |
 | 266,091 | Oct. 17, 1882 | H.F. Buecker | Bung-Hole Reamer |
 | 327,641 | Oct. 06, 1885 | G.W. Abbott, G.S. Forrest | Countersink |
| | 414,357 | Nov. 05, 1889 | J.E. Woodbridge | Screw Cutting Tool |
| | 492,733 | Feb. 28, 1893 | H. Meister | Chuck and Drill |
 | 602,449 | Apr. 19, 1898 | H. Hill | Boring Tool |
| | 610,158 | Aug. 30, 1898 | F.G. Echols | Tool for Cutting Screw Threads |
 | 624,439 | May 09, 1899 | A.L. Adams | Expansion-Bit |
 | 687,724 | Dec. 03, 1901 | J.F. Cadell | Boring-tool |
 | 879,309 | Feb. 18, 1908 | E. Pastore | Expansible bit |
 | 963,468 | Jul. 05, 1910 | E. Pastore | Expansible Bit |
