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| Patents for D. E. Carlsen | |||||
| Number | Date | Patentee | Title | Type | |
| 621,869 | Mar. 28, 1899 | J. Stynsberg | Monkey Wrench | screw adjust wrenches | |
| 906,614 | Dec. 15, 1908 | H. Christopherson | Wrench | alligator wrenches | |