| All Patents in class 408/102 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
 | 99,495 | Feb. 01, 1870 | G.C. Taft | Improved machine for drilling metals |
| | 124,681 | Mar. 19, 1872 | L. Hillebrand | Improvement in Hand Drills |
| | 144,618 | Nov. 18, 1873 | F. Jonas | Hub-Boring Machine |
 | 317,336 | May 05, 1885 | J.M. Glenn | Drill |
 | 549,661 | Nov. 12, 1895 | A.A. Smith | Ratchet-drill |
 | 782,221 | Feb. 14, 1905 | P.J. Creeden | Auger-Bit |
 | 996,612 | Jul. 04, 1911 | J.W. Caldwell | Auger-Bit |
| | 1,403,366 | Jan. 10, 1922 | W.A. Whitney | Screw Punch |
| | 1,797,361 | Mar. 24, 1931 | C.M. Park, B.E. Bark | Attachment for power drills |
