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| Patents for Joseph Francis Mangin | |||||
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| Number | Date | Patentee | Title | Type | |
| 120X | Jul. 02, 1796 | J.F. Mangin | Sawing and Polishing Marble and other Stones | stonemason | |
| 150X | Feb. 16, 1797 | J.F. Mangin | Cutting and Polsihing Marble | stonemason | |