A digest of patents, issued by the United States, from 1790 to January 1, 1839: published by Act of Congress under the superintendence of the Commissioner of Patents (1840)
United States. Patent Office, Ellsworth, Henry Leavitt, 1791-1858 · Washington, D.C., Printed by Peter Force · leaf 29
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Patents · Patent laws and legislation
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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