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Official List of Patents

Issued by the Untied States Patent Office. For the Week Ending Dec. 14, 1869. Reported Officially to the Scientific American.

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Scientific American Magazine Vol 22 Issue 1This article was originally published with the title “Official List of Patents” in Scientific American Magazine Vol. 22 No. 1 (), p. 18
doi:10.1038/scientificamerican01011870-18a