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| Patents Granted on 1811-02-23 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,442X | Feb. 23, 1811 | T. Paul | Mode of producing what he calls Columbian oil | ||
| 1,443X | Feb. 23, 1811 | R.L. Nicolls | Mode of preserving and defending wood immersed in salt water from the attacks or injuries of that species of worms which is generally found destuctive at sea | ||