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Patents Granted on 1822-03-20 | |||||
Number | Date | Patentee | Title | Type | |
3,479X | Mar. 20, 1822 | S. Cranston | Spring shuttle spindle | weaver | |
3,480X | Mar. 20, 1822 | E. Green, M. Blackslee | Bending timber for sleighs, etc. | wood bending machines |