| All Patents in class 81/400 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 22,157 | Nov. 30, 1858 | J.R. Brown | Pipe-Tongs | pipe tongs |
| 142,143 | Aug. 26, 1873 | J.R. Brown | Pipe-Tongs | pipe tongs |
| 168,166 | Sep. 28, 1875 | A. McDonald | Improvement in Pipe-Tongs | pipe tongs |
| 2,379,107 | Jun. 26, 1945 | W. Scheck | Clamp Wrench | auxiliary levers on wrenches |
| 2,518,173 | Aug. 08, 1950 | B. Pepperdine | Adjustable Toggle Pliers | pliers |
| 2,521,276 | Sep. 05, 1950 | F.W. Lampe | Toggle Action Self-Locking Wrench and/or Nonlocking Pliers | locking pliers |
| 2,533,817 | Dec. 12, 1950 | A.A. Koskinen | Toggle Actuated, Slidable Jaw Wrench | locking pliers |
