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| All Patents in class 81/347 | |||||
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| Number | Date | Patentee | Title | Type | |
| 116,077 | Jun. 20, 1871 | J.A. Morrison | Improvement in Wrenches and Pipe-Tongs | pipe tongs | |
| 351,656 | Oct. 26, 1886 | F.C. Sawhill | Wrench | self-adjust wrenches | |
| 360,731 | Apr. 05, 1887 | F.C. Sawhill | Wrench | self-adjust wrenches | |
| 370,960 | Oct. 04, 1887 | E.B. Manley | Pliers | pliers | |
| 398,118 | Feb. 19, 1889 | M.V. Barton | Pipe Wrench | pipe wrenches | |
| 444,207 | Jan. 06, 1891 | F.W. Brocksieper | Pliers | pliers | |
| 605,441 | Jun. 07, 1898 | A.E. Brockett | Pipe Wrench | pipe wrenches | |