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| Patents Granted on 1803-03-24 | |||||
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| Number | Date | Patentee | Title | Type | |
| 438X | Mar. 24, 1803 | G. Hunter | Improvement in the Process of Manufacturing Sea Salt | manufacturing salt | |
| 439X | Mar. 24, 1803 | J.B. Picornell, P. DeLaBigarre | Improvement in the Mode of Obtaining Antiseptic Gas | medical remedies | |