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| Patents Granted on 1826-05-18 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,436X | May 18, 1826 | E. Treadwell | Bread, Biscuit | cracker and biscuit machines | |
| 4,437X | May 18, 1826 | A. Mercer (Messer) | Constructing water wheels and flumes | water wheels | |
| 4,438X | May 18, 1826 | W. Kendall, Jr. | Circular saw | circular saws | |