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| Patents for Oliver Barrett Jr. | |||||
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| Number | Date | Patentee | Title | Type | |
| 840X | Mar. 23, 1808 | O. Barrett, Jr. | Fanning mill for grain or clover seed, etc. | fanning mills | |
| 1,623X | Dec. 03, 1811 | O. Barrett, Jr. | Machine for roving cotton | spinner | |
| 1,846X | Dec. 08, 1812 | O. Barrett, Jr. | Machine for making cloth by felting | ||