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| Patents Granted on 1826-05-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,439X | May 20, 1826 | F.A. Priest, J. Watt | Family spinning machine | spinner | |
| 4,440X | May 20, 1826 | J. Collin, J.C. Collier | Machine for sawing felloes | other wood sawing machines | |
| 4,441X | May 20, 1826 | W. West | Art of ornamenting walls, ceilings, etc. | ||
| 4,442X | May 20, 1826 | W.H. Hoeg | Press for cider, oil, etc. | cider presses | |