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| Patents for Charles N. Butler | |||||
| Number | Date | Patentee | Title | Type | |
| 893,846 | Jul. 21, 1908 | T.C. Hook, J.H. Mitchell | Package-wrapping machine | baker | |
| 1,041,858 | Oct. 22, 1912 | D.J. Normoyle | Tap Wrench | tap wrenches and die stocks | |