| All Patents of Type: drill bits |
Patents 1 -
15
of 59
      |
| Number | Date | Patentee | Title | Type |
| 4,509X | Aug. 07, 1826 | H. Branch | Mortising machine | mortising machines |
| 8,752X | Apr. 08, 1835 | N.J. Lampman | Wood auger | drill bits |
| 9,313X | Jan. 11, 1836 | W.R. Jones | Drills for metal | drill bits |
| 82 | Nov. 17, 1836 | G. Page | Spiral bit with countersink for setting screws | drill bits |
| RE72 | Jul. 30, 1845 | E. L'Hommedieu | Improvement in machinery for manufacturing double-twist screw-augers | drill bits |
| 10,744 | Apr. 04, 1854 | A. Pease | Drill for metal gun-barrels | drill bits |
| 11,587 | Aug. 22, 1854 | B.F. Graves | Tool for boring recesses for casters, &c. | drill bits |
| 22,394 | Dec. 21, 1858 | N.S. White, A. Denio | Method of attaching cutting-tips to auger-shanks | tool making machines |
| 22,474 | Dec. 28, 1858 | H. Stone | Expanding bit | drill bits |
| 27,782 | Apr. 10, 1860 | L. Eames | Mortising-tool | mortise chisels |
| 43,673 | Aug. 02, 1864 | R. Dudgeon | Drill | drill bits |
| 47,812 | May 23, 1865 | W.W. Grier, R.H. Boyd | Improved drill-bit | drill bits |
| 82,583 | Sep. 29, 1868 | Q.S. Backus | Improved chuck-drill | drill bits |
| 87,796 | Mar. 16, 1869 | H.L. Shailer | Double-twist auger | drill bits |
| 88,760 | Apr. 06, 1869 | C. Whitehouse | Improvement in bits and augers | drill bits |
