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| Patents Granted on 1812-07-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,778X | Jul. 20, 1812 | J. Morgan, W.G. Crease | Mathematical boot | ||
| 1,779X | Jul. 20, 1812 | B. Alison, P. Ward | Economical candle holder | ||