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| Patents Granted on 1827-12-11 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,939X | Dec. 11, 1827 | H. Schoonhaven (Schoonhoom) | Machine for breaking flax | flax and hemp machines | |
| 4,940X | Dec. 11, 1827 | I. Carver, Jr. | Slinging the yards of vessels | ||
| 4,941X | Dec. 11, 1827 | B. Overman | Saw mill | sawmills | |
| 4,942X | Dec. 11, 1827 | J. Robison (Robinson) | Grist mill | grist mills | |