| All Patents of Type: drill bits |
Patents 1 -
15
of 88
      |
| 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 |
| 21,179 | Aug. 17, 1858 | C.L. Barnes | Bit with Detachable Cutter | drill bits |
| 21,960 | Nov. 02, 1858 | W.O. Hickok | Tap for Cutting Wooden Screws | 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 |
| 39,288 | Jul. 21, 1863 | C.W. Harris | Improved Bung Cutter | drill bits |
| 41,517 | Feb. 09, 1864 | G.W. Low | Pump Boring Bits | drill bits |
| 45,483 | Dec. 20, 1864 | A. Eliaers | Bit for Undercut Holes | drill bits |
