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| Patents Granted on 1827-02-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,674X | Feb. 20, 1827 | J. Brown, G.W. Robinson | Mode of making locks for doors | ||
| 4,675X | Feb. 20, 1827 | R. Rhodes | Plough | plows | |
| 4,676X | Feb. 20, 1827 | W.A. Hart | Percussion gun lock | gunsmith | |