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| Patents for Silvester Doolittle | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,228X | Oct. 25, 1825 | S. Doolittle | Machine for raising canal boats to be repaired | boat raising machines | |
| 7,796X | Nov. 19, 1833 | S. Doolittle | Boats for canals and rivers | shipwright | |