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| Patents for Charles T. Hannigan | |||||
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| Number | Date | Patentee | Title | Type | |
| 786,353 | Apr. 04, 1905 | C.R. Gabriel | Screw Machine | screw machines | |
| 826,728 | Jul. 24, 1906 | J.G. Lind | Pipe-Wrench | self-adjust wrenches | |