Index to the U.S. patent classification
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Previous Title: | United States. Patent Office. Index to classification |
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Corporate Authors: | United States. Patent and Trademark Office, United States. Patent and Trademark Office. Office of Classification Support |
Format: | Serial |
Language: | English |
Published: |
[Washington, D.C.] :
U.S. Dept. of Commerce, Patent and Trademark Office : [Supt. of Docs., U.S. G.P.O., distributor,
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Library Has: | LATEST EDITION ONLY |
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