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| All Patents of Type: making hats | |||||
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| Number | Date | Patentee | Title | Type | |
| 461X | Jun. 13, 1803 | E. Corning, Sr. | Improvement in the Manufacturing of Hats | making hats | |
| 481X | Sep. 09, 1803 | G. Cleveland | Preparing Seals' Fur for Hats | making hats | |
| 5,603X | Aug. 06, 1829 | J.D. Wilson | Stiffening of Hats | making hats | |