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| Patents for Francis C. Sanford | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,483,748 | Feb. 12, 1924 | F.C. Sanford | Grinding Machine | centerless grinders | |
| 1,611,135 | Dec. 14, 1926 | F.C. Sanford | Grinding Machine | centerless grinders | |
| 1,611,136 | Dec. 14, 1926 | F.C. Sanford | Centerless Grinding Machine for Tapering Drills and the Like | centerless grinders | |