| All Patents in class 81/413 |
Patents 16 -
23
of 23
      |
| Number | Date | Patentee | Title | Type |
| 602,590 | Apr. 19, 1898 | L.C. Springer | Pipe Wrench | pipe wrenches |
| 638,474 | Dec. 05, 1899 | E.C. Rollins | Wrench | pliers type wrenches |
| 644,825 | Mar. 06, 1900 | T. Jensen | Improvements in Tongs and Wrenches | pliers type wrenches |
| 690,860 | Jan. 07, 1902 | W. Hopkie | Tongs | pipe tongs |
| 754,740 | Mar. 15, 1904 | O.C. Wovries, E. Bordewisch | Adjustable Wrench | quick adjust wrenches |
| 1,526,660 | Feb. 17, 1925 | C.H. Bowers | Skirt board tongue cutter | |
| 1,546,139 | Jul. 14, 1925 | R.F. Lévéque | Pliers | pliers |
| 2,714,198 | Jul. 26, 1955 | H.F. Schoetzer | Ground Connector for Electric Welding | |
