| All Patents in class 30/495 |
Patents 16 -
30
of 115
      |
| Number | Date | Patentee | Title | Type |
| 29,657 | Aug. 21, 1860 | D. Argerbright | Combined Chuck and Countersink | hollow bits |
| 30,889 | Dec. 11, 1860 | O. Schevenell | Tenoning-Tool | hollow bits |
| 34,159 | Jan. 14, 1862 | W. Morehouse | Spoke-Tenon Auger | auger bits |
| 34,497 | Feb. 25, 1862 | A.B. Hendryx | Improvement in Hollow Augers | hollow bits |
| 38,877 | Jun. 16, 1863 | I.L. Beckwith | Improvement in Machines for Round Tenons | hollow bits |
| 39,284 | Jul. 21, 1863 | R. Gaylord | Improvement in hollow augers | hollow bits |
| 39,841 | Sep. 08, 1863 | G.N. Stearns | Improvement in Hollow Augers | hollow bits |
| 42,639 | May 10, 1864 | C.L. Campbell | Hollow Auger | wheelwright |
| 51,911 | Jan. 09, 1866 | M. Smith, F. Beals | Improvement in Hollow Augers | hollow bits |
| 55,382 | Jun. 05, 1866 | J.M. Smith | Improvement in Hollow Augers | hollow bits |
| 56,459 | Jul. 17, 1866 | J.H. Smith | Improvement in Hollow Augers | hollow bits |
| 58,436 | Oct. 02, 1866 | J. Lefeber | Improvement in Hollow Augers | hollow bits |
| 58,658 | Oct. 09, 1866 | J. McClure | Improvement in Hollow Augers | hollow bits |
| 60,972 | Jan. 01, 1867 | J. Ward | Improvement in Hollow Augers | hollow bits |
| 60,985 | Jan. 01, 1867 | E. Young | Improvement in Hollow Augers | hollow bits |
