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| Patents for Stephen Colver | |||||
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| Number | Date | Patentee | Title | Type | |
| 223X | Dec. 14, 1798 | S. Colver | Machine for cleaning docks and harbors | nautical apparatus | |
| 224X | Dec. 14, 1798 | S. Colver | Machine for heaving down vessels, raising weights, etc. | ||