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| Patents Granted on 1841-03-12 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,001 | Mar. 12, 1841 | D. Philips | Sawmill | circular sawmills | |
| 2,003 | Mar. 12, 1841 | J.M. Van Osdel | Wind Wheel | wind power apparatus | |