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| Patents for Joel Hahn | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,325,245 | Jul. 27, 1943 | J. Hahn | Plier Type Wrench | pliers type wrenches | |
| 2,358,858 | Sep. 26, 1944 | J. Hahn | Plier Type Wrench | pliers type wrenches | |