| All Patents in class 408/229 |
Patents 1 -
10
of 15
      |
| Picture | Number | Date | Patentee | Title |
 | 82,583 | Sep. 29, 1868 | Q.S. Backus | Improved chuck-drill |
 | 117,237 | Jul. 25, 1871 | S.L. Abbott | Improvement in Countersinks |
 | RE4,754 | Feb. 13, 1872 | S.L. Abbott | Improvement in Countersinks |
| | 241,974 | May 24, 1881 | S. Graves | Lathe Tool for Boring and Reaming |
 | 336,709 | Feb. 23, 1886 | B. Forstner | Auger |
| | 352,829 | Nov. 16, 1886 | E.L. Mansfield | Reaming Tool |
 | 479,682 | Jul. 26, 1892 | J.W. Tompkins | Reamer |
 | 1,241,176 | Sep. 25, 1917 | H.J. Watts | Drill or boring member |
| | 1,399,142 | Dec. 06, 1921 | W.L. Miller | Reamer Head |
 | 1,409,921 | Mar. 21, 1922 | C.C. Buck | Reamer |
