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| Patents for Leonard Foster | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,817X | Feb. 16, 1824 | L. Foster | Windlass bedstead | ||
| 3,898X | Jun. 25, 1824 | L. Foster | Windlass bedstead | ||
| 6,396X | Feb. 25, 1831 | L. Foster | Fastening mortise door | ||