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Inventions

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Classified Index of Subjects of Invention Adopted in the U. S. Patent Office, March 1, 1872 by United States. Patent Office - Book cover

Classified Index of Subjects of Invention Adopted in the U. S. Patent Office, March 1, 1872

by United States. Patent Office

1872

Classified Index of Subjects of Invention Adopted in the U. S. Patent Office, March 1, 1872 by United States. Patent Office - Book cover

Classified Index of Subjects of Invention Adopted in the U. S. Patent Office, March 1, 1872

by United States. Patent Office

1872

Patent Abstract Series by United States. Government Patents Board - Book cover

Patent Abstract Series

by United States. Government Patents Board

1954

Patent Abstract Series by United States. Government Patents Board - Book cover

Patent Abstract Series

by United States. Government Patents Board

1954

National Patent Policy by United States. Congress. Senate. Committee on the Judiciary. Subcommittee on Patents, Trademarks, and Copyrights - Book cover

National Patent Policy

by United States. Congress. Senate. Committee on the Judiciary. Subcommittee on Patents, Trademarks, and Copyrights

1961

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