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| Patents Granted on 1828-02-09 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,992X | Feb. 09, 1828 | L. Pratt, F. Bush | Machine for Junking Ivory by Steam | material cutting machines | |
| 4,993X | Feb. 09, 1828 | D.W. Webster | Machine for thrashing grain and grass seed | miller | |