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| Patents for Mills Pencil Sharpener Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 448,723 | Mar. 24, 1891 | J.D. Mills | Pencil-sharpener | pencil sharpeners | |
| 459,180 | Sep. 08, 1891 | G.C. McDermott, J.D. Mills | Pencil-sharpener | pencil sharpeners | |