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| Patents Granted on 1822-04-25 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,507X | Apr. 25, 1822 | W. Ball | Knives for cutting up whale blubber | ||
| 3,508X | Apr. 25, 1822 | W.H. Allen | Attaching rigging to mast heads | boats and ships | |