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| All Patents in class 451/316 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,266,183 | May 14, 1918 | H.A. Vincent | Device for Sharpening Safety Razor Blades | cutler | |
| 1,492,608 | May 06, 1924 | H. Morrison | Blank feeding and chucking machine | wood lathe accessories | |