| All Patents in class 81/68 |
Patents 1 -
15
of 66
      |
| Number | Date | Patentee | Title | Type |
| 114,348 | May 02, 1871 | E.H. Robbins | Improved Pipe-Hook | chain and strap wrenches |
| 122,638 | Jan. 09, 1872 | C. Neames | Combined Gas-Pipe Wrench, Gas-Pipe Vise and Square Wrench | pipe wrenches |
| 219,758 | Sep. 16, 1879 | R.R. Piper | Pipe-Wrench | chain and strap wrenches |
| 235,957 | Dec. 28, 1880 | J.O. Morse | Pipe Tongs | chain and strap wrenches |
| 238,761 | Mar. 15, 1881 | J.J. Carmody | Pipe Wrench | chain and strap wrenches |
| 241,674 | May 17, 1881 | W.T. Kosinski | Pipe Wrench | chain and strap wrenches |
| 249,968 | Nov. 22, 1881 | T.D. Mernan | Pipe Wrench | chain and strap wrenches |
| 250,186 | Nov. 29, 1881 | L.J. Baker | Bit-stock | eggbeater drills |
| 257,344 | May 02, 1882 | W.T. Kosinski | Device For Converting Motion | chain and strap wrenches |
| 282,372 | Jul. 31, 1883 | E.H. Robbins | Pipe Wrench | chain and strap wrenches |
| 298,294 | May 06, 1884 | J. Doyle | Pipe Wrench | chain and strap wrenches |
| 337,627 | Mar. 09, 1886 | F.H. Seymour | Pipe Wrench Attachment For Monkey Wrenches | chain and strap wrenches |
| 348,751 | Sep. 07, 1886 | J. Leib | Pipe Wrench | chain and strap wrenches |
| 354,197 | Dec. 14, 1886 | J. Leib | Pipe Wrench | chain and strap wrenches |
| 366,451 | Jul. 12, 1887 | W.H. Brock | Chain Wrench | chain and strap wrenches |
