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| Patents Granted on 1822-04-27 | |||||
| Number | Date | Patentee | Title | Type | |
| 3,509X | Apr. 27, 1822 | T. White | Saw mill | sawmills | |
| 3,510X | Apr. 27, 1822 | W. Loomis | Machine for getting out clover seed | miller | |
| 3,511X | Apr. 27, 1822 | E. Higgins | Fire engines | fire engines | |