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| Patents for Nathan E. Campbell | |||||
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| Number | Date | Patentee | Title | Type | |
| 156,640 | Nov. 10, 1874 | W.R. Landfear, N.E. Campbell | Improvement in lathes for turning spools | spool or bobbin machines | |
| 170,861 | Dec. 07, 1875 | W.R. Landfear | Improvement in lathes for turning spools | spool or bobbin machines | |