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| Patents Granted on 1838-06-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 794 | Jun. 20, 1838 | W.B. Davis | Clover Huller | clover hullers | |
| 797 | Jun. 20, 1838 | J. Lindly | Machine for cutting screws on the ends of bedstead-rails | specialty woodworking machines | |