| All Patents in class 81/398 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 142,143 | Aug. 26, 1873 | J.R. Brown | Pipe-Tongs | pipe tongs |
| 150,131 | Apr. 28, 1874 | J.R. Brown | Pipe-Tongs | pipe tongs |
| 539,012 | May 07, 1895 | A.E. Smith | Pipe Wrench | pipe wrenches |
| 562,719 | Jun. 23, 1896 | A.W. Freeman | Pipe Wrench | pipe wrenches |
| 578,249 | Mar. 02, 1897 | M.D. Letteer | Combination Tool | wrench combination tools |
| 1,568,934 | Jan. 05, 1926 | R.J. Bristol, W.C. Tull | Wrench | locking pliers |
| 2,206,251 | Jul. 02, 1940 | F.C. Fischer | Wrench | locking pliers |
| 2,637,236 | May 05, 1953 | M.H. Vergnani, S.E. Vergnani, E. Vergnani | Liner for the Jaw Faces of Pipe Wrenches | pipe jaw attachments for wrenches |
| 2,672,778 | Mar. 23, 1954 | H.T. Jones | Quick-Release Toggle Wrench | locking pliers |
| 2,751,801 | Jun. 26, 1956 | J.L. Hostetter | Self-Adjusting Plier-Type Toggle Locking Wrench | locking pliers |
| 2,814,222 | Nov. 26, 1957 | E.G. Sanders | Ferrule Crimping Pliers with Replaceable Jaws | pliers |
