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| Patents for Nathaniel C. Sanford & Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,036 | Mar. 27, 1847 | A. Newton, L.B. Smith, E. Sanford | Wood auger | auger bits | |
| 6,221 | Mar. 27, 1849 | N.C. Sanford | Means of auger manufacture | auger bits | |
| 15,147 | Jun. 17, 1856 | N.C. Sanford | Auger-Handle | auger handles | |
| 36,534 | Sep. 23, 1862 | N.C. Sanford | Improvement in Augers | auger bits | |
| 79,012 | Jun. 16, 1868 | N.C. Sanford | Improvement in Augers | auger bits | |