| All Patents in class 81/150 |
Patents 1 -
10
of 38
      |
| Picture | Number | Date | Patentee | Title |
 | 12,510 | Mar. 13, 1855 | J. Hyde | Improvement in Screw-Wrenches |
 | 13,597 | Sep. 25, 1855 | H.J. Behrens | Improvement in Wrenches for Turning Screw-Nuts |
 | 42,239 | Apr. 05, 1864 | A. Leigh, C.R. Thorn | Improved Screw-Wrench |
 | 56,147 | Jul. 03, 1866 | A.M. Olds | Improvement in Wrenches |
 | 97,849 | Dec. 14, 1869 | S. Zarley | Improvement in Monkey-Wrench |
 | 109,913 | Dec. 06, 1870 | C. Knisely | Wrench |
 | 114,179 | Apr. 25, 1871 | F.B. Morse | Improvement in Wrenches |
 | 120,641 | Nov. 07, 1871 | I.S. Hamilton | Improvement in Pipe Wrenches |
 | 139,174 | May 20, 1873 | F.H. Merrill | Improved Pipe Tongs |
 | 144,134 | Oct. 28, 1873 | L.B. Prindle | Improvement in wrenches |
