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| All Patents of Type: mill stone picks | |||||
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| Number | Date | Patentee | Title | Type | |
| 47X | Oct. 23, 1792 | S. Hodge, J. Dorr | Handmill for picking of mill stones | mill stone picks | |
| 9,450X | Mar. 02, 1836 | S. Etheridge | Mill-stone picks | mill stone picks | |
| 21,184 | Aug. 17, 1858 | J.P. Brady | Millstone Pick | mill stone picks | |
| 313,725 | Mar. 10, 1885 | J. Granger | Millstone Pick | mill stone picks | |