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| Patents Granted on 1821-10-08 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,389X | Oct. 08, 1821 | R. Bulkley | Right and left chain wheel | ||
| 3,390X | Oct. 08, 1821 | F. Crey | Preventive for smoking chimneys | ||