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| Patents Granted on 1834-05-12 | |||||
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| Number | Date | Patentee | Title | Type | |
| 8,187X | May 12, 1834 | D.G. Colburn | Raising and conveying water for propelling machinery | ||
| 8,188X | May 12, 1834 | S. Slater, S. Noblet | Shelling and grinding corn | miller | |
| 8,189X | May 12, 1834 | N. Wyeth | Dough for bread | ||