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| Patents for Efficient Vise and Wrench Co. | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 1,293,734 | Feb. 11, 1919 | W.S. DuCharme | Pipe Wrench | |
![]() | 1,293,735 | Feb. 11, 1919 | W.S. DuCharme | Turret Head Wrench | |