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| Patents Granted on 1810-03-28 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,248X | Mar. 28, 1810 | L. Holland | Horizontal pump | pumps | |
| 1,249X | Mar. 28, 1810 | D. Williams, III | Machine for manufacturing ivory combs | ||
| 1,250X | Mar. 28, 1810 | B. Wheeler | Manufacturing salt | ||
| 1,251X | Mar. 28, 1810 | J.L. Miller | Screw grist mill | grist mills | |