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| Patents Granted on 1821-10-15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,393X | Oct. 15, 1821 | B. Simmons, Jr. | Stove bottom boiler | stoves | |
| 3,394X | Oct. 15, 1821 | B. Simmons, Jr. | Oven door flue | household tools | |