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| Patents for John Dix Mills | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 448,723 | Mar. 24, 1891 | J.D. Mills | Pencil-sharpener | |
![]() | 459,180 | Sep. 08, 1891 | G.C. McDermott, J.D. Mills | Pencil-sharpener | |