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| Patents for J. Fredr. Acker | |||||
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| Number | Date | Patentee | Title | Type | |
| 536,882 | Apr. 02, 1895 | J.G. Lowe | Wrench | bicycle or pocket wrenches | |
| 548,962 | Oct. 29, 1895 | C.B. Collins | Wrench | quick adjust wrenches | |