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| Patents for Ambrose Foster | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,944X | Dec. 19, 1827 | A. Foster | Common hand rake for hay | hay or straw rakes | |
| 6,766X | Sep. 28, 1831 | A. Foster, W. Avery | Reacting steam engine | rotary steam engines | |
| XC-146 | Nov. 21, 1833 | A. Foster | An improvement in the steam engine, called the re-acting engine | steam engines | |