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| Patents Granted on 1825-06-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,152X | Jun. 21, 1825 | T.P. Kneeland | Improvement on Jas. Lee's machine for brick moulding & making | brick maker | |
| 4,153X | Jun. 21, 1825 | J. Shaw | Mode of rectifying distilled spirits by steam | ||