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| Patents Granted on 1818-08-27 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,993X | Aug. 27, 1818 | J. Drummond | Catching fish by gill nets | ||
| 2,994X | Aug. 27, 1818 | E. Treadwell | Constructing ovens in the American stoves | ovens | |
| 2,995X | Aug. 27, 1818 | E. Warren | Loom | looms | |
| 2,996X | Aug. 27, 1818 | J.A. Gittwaldt (Guttwaldt) | Improvement in the piano forte | music instrument maker | |