| All Patents in class 408/230 |
Patents 1 -
15
of 40
      |
| Number | Date | Patentee | Title | Type |
| 1,114X | Jul. 31, 1809 | E. L'Hommedieu | Double podded central screw auger | auger bits |
| 2,642X | Jul. 17, 1816 | E. L'Hommedieu | Single twist screw auger | auger bits |
| 8,349X | Aug. 08, 1834 | A. Newton | Wood auger | auger bits |
| 8,350X | Aug. 08, 1834 | N.C. Sanford | Wood auger | auger bits |
| 5,036 | Mar. 27, 1847 | A. Newton, L.B. Smith, E. Sanford | Wood auger | auger bits |
| 6,088 | Feb. 06, 1849 | H. Peeler | Improved Method of Boring Gun-Barrels | twist drill bits |
| 6,221 | Mar. 27, 1849 | N.C. Sanford | Means of auger manufacture | auger bits |
| 8,162 | Jun. 17, 1851 | R. Cook | Auger | auger bits |
| 13,897 | Dec. 04, 1855 | C.C. Tolman | Gimlet | gimlets |
| 14,752 | Apr. 22, 1856 | K. Curtiss | Improved auger | auger bits |
| 38,119 | Apr. 07, 1863 | S.A. Morse | Twist drill bit | twist drill bits |
| 41,517 | Feb. 09, 1864 | G.W. Low | Pump Boring Bits | drill bits |
| 61,208 | Jan. 15, 1867 | A.C. Kasson | Improvement in augers | auger bits |
| 79,012 | Jun. 16, 1868 | N.C. Sanford | Improvement in Augers | auger bits |
| 81,607 | Sep. 01, 1868 | P. Cunningham | Bit for Mortising Machine | drill bits |
