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| Patents Granted on 1828-06-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,146X | Jun. 21, 1828 | E.A. Talbot | Improvement in Talbot's atmospheric propelling engine | ||
| 5,147X | Jun. 21, 1828 | J. Hale | Dressing staves | cooper | |