| All Patents in class 408/121 |
Patents 1 -
10
of 68
      |
| Picture | Number | Date | Patentee | Title |
 | 5,894 | Oct. 31, 1848 | J. Johnson | Hand-drill |
 | 20,728 | Jun. 29, 1858 | H.H. Packer | Hand-drill |
 | 28,328 | May 15, 1860 | J.H. Parker | Hand-drill |
 | 37,971 | Mar. 24, 1863 | L.H. Olmsted | Ratchet brace |
 | 38,486 | May 12, 1863 | S. Ingersoll | Improved Friction Clutch |
 | 39,496 | Aug. 11, 1863 | E.A. Raymond | Ratchet Drill |
 | 42,560 | May 03, 1864 | J.C. Chapman | Ratchet Drill |
 | 43,109 | Jun. 14, 1864 | H. Getty | Improved ratchet-drill |
 | 46,981 | Mar. 28, 1865 | E.H. Ashcroft | Improved ratchet-drill |
 | 47,446 | Apr. 25, 1865 | L.H. Olmsted | Improved ratchet-brace |
