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| Patents Granted on 1822-05-31 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,533X | May 31, 1822 | R. Leal | Vertical Tide Water Wheel | tide mills | |
| 3,534X | May 31, 1822 | J. Butters | Machine for splitting leather | splitting and shearing machinery | |