Concordance, United States patent classification to international patent classification.

By: United States. Patent Documentation Organizations
Publisher: Washington, D.C. : U.S. Dept. of Commerce, Patent and Trademark Office, Patent Documentation Organizations : For sale by the G.P.O., Supt. of Docs., 1995Edition: 1995 edDescription: 194 p. ; 28 cmISBN: 0160454972 :Subject(s): Patents -- United States -- Classification
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"January 1995."

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