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| Patents for Robert Sollberger | |||||
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| Number | Date | Patentee | Title | Type | |
| 547,534 | Oct. 08, 1895 | A.D. Barnett | Wrench | screw adjust wrenches | |
| 602,689 | Apr. 19, 1898 | A. Poincenot, J. Reymond | Screw Cutting Machine | ||