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Patents Granted on 1820-03-06 | |||||
Number | Date | Patentee | Title | Type | |
3,178X | Mar. 06, 1820 | A. Brewster | Improvement in ship building | ||
3,179X | Mar. 06, 1820 | E. Griffiths | Improvement in fire places | ||
3,180X | Mar. 06, 1820 | T. Mussey | Hollow or Guttered Grid Irons | fireplace tools |