| All Patents in class 81/412 |
Patents 1 -
10
of 26
      |
| Picture | Number | Date | Patentee | Title |
 | 178,902 | Jun. 20, 1876 | T. Booth | Pipe-Wrench |
 | 295,885 | Mar. 25, 1884 | H.S. Pullman | Pipe-Tongs |
 | 637,251 | Nov. 21, 1899 | A.L. Hamilton | Wrench |
 | 740,553 | Oct. 06, 1903 | J.A. Schlehr, N. Grandchamp | Bolt Holder |
| | 826,153 | Jul. 17, 1906 | A.H. De Groff | Wrench |
 | 957,560 | May 10, 1910 | G.L. Holt | Pliers or Pipe-Tongs |
 | 1,016,296 | Feb. 06, 1912 | J.A. Schlehr | Bolt Holder |
 | 1,122,165 | Dec. 22, 1914 | L. Schoening | Pliers |
 | 1,175,391 | Mar. 14, 1916 | C.N. Waterhouse | Improvement in Pliers |
 | 1,216,886 | Feb. 20, 1917 | W.S. Thomson | Gas Pliers |
