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| Patents for James Smallman | |||||
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| Number | Date | Patentee | Title | Type | |
| 210X | May 31, 1798 | N.J. Roosevelt, J. Smallman | Double Steam Engine | steam engines | |
| 1,375X | Sep. 18, 1810 | J. Smallman, J. Philips | Steering vessels | ||
| 2,280X | Mar. 27, 1815 | J. Smallman | Pump | pumps | |
| 2,371X | Aug. 29, 1815 | J. Smallman | Double air and water pump | water pumps | |