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| Patents Granted on 1819-04-30 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,100X | Apr. 30, 1819 | G.N. Reynolds | Improvement on the moveable axle | ||
| 3,101X | Apr. 30, 1819 | E. Brown | Tobacco press | tobacco machinery | |
| 3,102X | Apr. 30, 1819 | J. Lansing, Jr. | Use of hemlock in tanning | ||