Patents & inventions: an information aid for inventors
Previous Title: | United States. Patent Office Patents & inventions: an information aid for inventors |
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Corporate Author: | |
Format: | Government Document Serial |
Language: | English |
Published: |
[Washington]
U.S. Dept. of Commerce, Patent and Trademark Office [For sale by the Supt. of Docs., U.S. Govt. Print. Off.]
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Subjects: |