| All Patents in class 81/68 |
Patents 1 -
10
of 66
      |
| Picture | Number | Date | Patentee | Title |
 | 114,348 | May 02, 1871 | E.H. Robbins | Improved Pipe-Hook |
 | 122,638 | Jan. 09, 1872 | C. Neames | Combined Gas-Pipe Wrench, Gas-Pipe Vise and Square Wrench |
 | 219,758 | Sep. 16, 1879 | R.R. Piper | Pipe-Wrench |
 | 235,957 | Dec. 28, 1880 | J.O. Morse | Pipe Tongs |
 | 238,761 | Mar. 15, 1881 | J.J. Carmody | Pipe Wrench |
 | 241,674 | May 17, 1881 | W.T. Kosinski | Pipe Wrench |
 | 249,968 | Nov. 22, 1881 | T.D. Mernan | Pipe Wrench |
 | 250,186 | Nov. 29, 1881 | L.J. Baker | Bit-stock |
 | 257,344 | May 02, 1882 | W.T. Kosinski | Device For Converting Motion |
 | 282,372 | Jul. 31, 1883 | E.H. Robbins | Pipe Wrench |
