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| Patents for John A. Bergstrom | |||||
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| Number | Date | Patentee | Title | Type | |
| 548,962 | Oct. 29, 1895 | C.B. Collins | Wrench | quick adjust wrenches | |
| 1,282,735 | Oct. 29, 1918 | L. Blumenthal | Knife Sharpener for Cloth Cutting Machines | ||