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| Patents for Simeon Guilford | |||||
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| Picture | Number | Date | Patentee | Title | |
| 4,309X | Jan. 11, 1826 | S. Guilford | Water cement | ||
| 4,493X | Jul. 10, 1826 | S. Guilford | Mode of preserving wooden locks in canals | ||
| 4,633X | Jan. 16, 1827 | S. Guilford | Water proof mortar or cement | ||