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| Patents for Julius Pratt | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 6,310X | Dec. 28, 1830 | J. Pratt | Method of making ivory, bone, and wood combs | |
 | 1,837 | Oct. 28, 1840 | W.M. Fowler | Machine for planing and forming ivory for combs | |