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| Patents for Nicholas B. Hadley | |||||
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| Number | Date | Patentee | Title | Type | |
| 91,117 | Jun. 08, 1869 | N.B. Hadley | Improvement in machines for threading screws | screw machines | |
| 106,153 | Aug. 09, 1870 | N.B. Hadley | Improvement in scroll-saw | scrollsaws | |