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| Patents for Nicholas B. Hadley | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 91,117 | Jun. 08, 1869 | N.B. Hadley | Improvement in machines for threading screws | |
![]() | 106,153 | Aug. 09, 1870 | N.B. Hadley | Improvement in scroll-saw | |