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| All Patents in class 81/91.3 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 340,410 | Apr. 20, 1886 | I. Anderson | Pipe Wrench | |
 | 372,750 | Nov. 08, 1887 | C.W. Hale | Wrench | |
 | 422,257 | Feb. 25, 1890 | E.A. Smead | Pipe Wrench and Pipe and Bolt Cutter | |
 | 441,017 | Nov. 18, 1890 | W.O. Nightengale | Pipe Tongs | |
 | 1,332,984 | Mar. 09, 1920 | R.D. Hill | Pipe Tongs | |
| 2,476,608 | Jul. 19, 1949 | J.M. Kinsey | Gate Box Turning Tool | ||