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| Patents Granted on 1820-11-22 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,256X | Nov. 22, 1820 | R. Graves | Improved mode of drawing yarns and forming them into readies | ||
| 3,257X | Nov. 22, 1820 | R. Graves | Machine for equalizing the strain on yarns | spinner | |
| 3,258X | Nov. 22, 1820 | R. Graves | Machine for making and laying ropes | rope maker | |
| 3,259X | Nov. 22, 1820 | J.J. Giraud | Machine for propelling vessels | ||