| All Patents in class 81/36 |
Patents 1 -
10
of 47
      |
| Picture | Number | Date | Patentee | Title |
 | 10,499 | Feb. 07, 1854 | D.H. Chamberlain | Bit or drill stock |
 | 13,925 | Dec. 11, 1855 | G.H. Talbot | Auger-Handle |
 | 18,282 | Sep. 29, 1857 | B.B. Hill | Bit-holder |
 | 112,842 | Mar. 21, 1871 | G.G. Parker, W.P. Dodge | Improvement in bit and drill-braces |
 | 136,830 | Mar. 18, 1873 | G. Gibbs | Improvement in brace-drills |
 | 191,815 | Jun. 12, 1877 | D. Powers | Bit-stock with gear-train multiplier |
 | 250,186 | Nov. 29, 1881 | L.J. Baker | Bit-stock |
 | 268,284 | Nov. 28, 1882 | J.D. Richardson | Tool-stock |
 | 282,251 | Jul. 31, 1883 | A.H. Adams | Boring-brace |
| | 292,587 | Jan. 29, 1884 | J.D. Richardson | Bit and drill brace |
