| All Patents in class 408/223 |
Patents 1 -
15
of 40
      |
| Number | Date | Patentee | Title | Type |
| 82 | Nov. 17, 1836 | G. Page | Spiral bit with countersink for setting screws | drill bits |
| 166 | Apr. 17, 1837 | J. Barns | Standing Press | cotton presses |
| 1,723 | Aug. 14, 1840 | W.L. Harley | Machine for boring and mortising in chair seats, legs, and arms | drilling and boring |
| 4,829 | Oct. 29, 1846 | J. Guild | Boring and Cutting Screws on Bedsteads | wood threading machines |
| 7,083 | Feb. 12, 1850 | G. Flautt | Auger for boring-machines | drilling and boring |
| 36,534 | Sep. 23, 1862 | N.C. Sanford | Improvement in Augers | auger bits |
| 42,075 | Mar. 29, 1864 | E. Caswell | Improvement in machines for boring wagon-hubs | wheelwright |
| 60,207 | Dec. 04, 1866 | H.C. Lewis | Improved Countersink Bit | countersinks |
| 89,097 | Apr. 20, 1869 | C. Wardwell | Improvement in Augers | auger bits |
| 95,846 | Oct. 12, 1869 | S.A. Smith | Improvement in Combined Bit and Tap | auger bits |
| 104,335 | Jun. 14, 1870 | C. Monson | Improvement in Augers | auger bits |
| 155,148 | Sep. 22, 1874 | B. Forstner | Forstner Bit | drill bits |
| 164,999 | Jun. 29, 1875 | G.L. Holt | Twist Drill for Wood | twist drill bits |
| 216,023 | Jun. 03, 1879 | R.T. Crane | Improvement in Boring and Reaming Tools | tapered reamers |
| 248,854 | Nov. 01, 1881 | P.A. Gladwin | Auger Bit with Cross-Channel Lead Screw | auger bits |
