| All Patents in class 408/121 |
Patents 1 -
15
of 68
      |
| Number | Date | Patentee | Title | Type |
| 5,894 | Oct. 31, 1848 | J. Johnson | Hand-drill | hand drills |
| 20,728 | Jun. 29, 1858 | H.H. Packer | Hand-drill | ratchet braces |
| 28,328 | May 15, 1860 | J.H. Parker | Hand-drill | ratchet drills |
| 37,971 | Mar. 24, 1863 | L.H. Olmsted | Ratchet brace | ratchet braces |
| 38,486 | May 12, 1863 | S. Ingersoll | Improved Friction Clutch | hand drills |
| 39,496 | Aug. 11, 1863 | E.A. Raymond | Ratchet Drill | ratchet drills |
| 42,560 | May 03, 1864 | J.C. Chapman | Ratchet Drill | ratchet drills |
| 43,109 | Jun. 14, 1864 | H. Getty | Improved ratchet-drill | ratchet drills |
| 46,981 | Mar. 28, 1865 | E.H. Ashcroft | Improved ratchet-drill | ratchet drills |
| 47,446 | Apr. 25, 1865 | L.H. Olmsted | Improved ratchet-brace | ratchet braces |
| RE2,140 | Jan. 02, 1866 | H.H. Packer | Improvement in drills | ratchet braces |
| 52,106 | Jan. 16, 1866 | N.W. Woodbury | Improved Wrench and Drill | hand drills |
| 57,466 | Aug. 28, 1866 | G.W. Bishop | Improvement in ratchet-drills | ratchet braces |
| 69,399 | Oct. 01, 1867 | W. Brown | Improvement in Ratchet-Braces | ratchet braces |
| 71,463 | Nov. 26, 1867 | E. Davies, R.H. Taunton | Improved tool for drilling metals | braces |
