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| All Patents in class 81/108 | |||||
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| Number | Date | Patentee | Title | Type | |
| 503,215 | Aug. 15, 1893 | J. Francis, J. Joyce, T.H. Oxnam | Pipe Wrench | pipe wrenches | |
| 518,517 | Apr. 17, 1894 | T.W. Gillespie, J.P. Wynn | Pipe Wrench | pipe wrenches | |
| 543,494 | Jul. 30, 1895 | N.D. Macdonald | Pipe Wrench | pipe wrenches | |
| 1,193,163 | Aug. 01, 1916 | J.R. Long | Wrench | ||
| 1,552,091 | Sep. 01, 1925 | W.O. Thewes | Pipe Wrench | pipe wrenches | |
| 2,304,072 | Dec. 08, 1942 | L.R. Boos, J.B. Boos | Wrench | screw adjust wrenches | |