| All Patents in class 81/138 |
Patents 16 -
23
of 23
      |
| Number | Date | Patentee | Title | Type |
| 623,946 | Apr. 25, 1899 | M.D. Converse | Monkey Wrench | quick adjust wrenches |
| 876,931 | Jan. 21, 1908 | A.G. Blazier | Clamp | bar and pipe clamps |
| 939,879 | Nov. 09, 1909 | L.G. Van Ormer | Wrench | quick adjust wrenches |
| 1,409,863 | Mar. 14, 1922 | H.O. Johnson | Wrench | quick adjust wrenches |
| 1,411,471 | Apr. 04, 1922 | E.H. Booth | Pipe Wrench | pipe wrenches |
| 1,417,210 | May 23, 1922 | A. Shirk | Wrench | pliers type wrenches |
| 1,451,906 | Apr. 17, 1923 | I.C. Gellman | Wrench | quick adjust wrenches |
| 1,459,583 | Jun. 19, 1923 | O.E. Edstrom | Adjustable Wrench | quick adjust wrenches |
