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| All Patents in class 81/97 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,713,038 | May 14, 1929 | A.K. Ersland | Wrench | quick adjust wrenches | |
| 1,785,925 | Dec. 23, 1930 | J.C. Baker | Wrench | quick adjust wrenches | |
| 1,852,075 | Apr. 05, 1932 | E.W. Crocker | Wrench | pipe wrenches | |
| 2,259,216 | Oct. 14, 1941 | H.W. Small | Wrench | screw adjust wrenches | |
| 2,341,489 | Feb. 08, 1944 | J.E. Törnburg | Jawed Tool | locking pliers | |