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| Patents for John Helwig | |||||
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| Number | Date | Patentee | Title | Type | |
| 444,635 | Jan. 13, 1891 | J. Helwig | Bolt and Rivet Cutter | bolt cutters | |
| 1,502,192 | Jul. 22, 1924 | J. Helwig | Wrench and Process of Manufacturing the Same | screw adjust wrenches | |