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| Patents Granted on 1834-04-22 | |||||
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| Number | Date | Patentee | Title | Type | |
| 8,160X | Apr. 22, 1834 | S. Angell | Files for paper | ||
| 8,161X | Apr. 22, 1834 | A. Jones | Powder and other substances, by applying hydrogen gas and platina | ||