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| Patents for Necolai Hats | |||||
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| Number | Date | Patentee | Title | Type | |
| 133,636 | Dec. 03, 1872 | W.T. Farre | Improvement in machines for bending tubing | pipe and tube benders | |
| RE5,582 | Sep. 30, 1873 | W.T. Farre | Improvement in the methods of bending tubing | pipe and tube benders | |