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| Patents Granted on 1799-11-?? | |||||
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| Number | Date | Patentee | Title | Type | |
| 260X | Nov. 05, 1799 | D. Keller | Boat for descending rapid streams | boats and ships | |
| 261X | Nov. 29, 1799 | J. Stickney | Pumps for ships, mines, etc. | pumps | |