Concordance : United States patent classification to international patent classification /

Chiefly tables.

Bibliographic Details
Corporate Author:	United States. Patent Documentation Organizations
Format:	Government Document Serial
Language:	English
Published:	Washington, D.C. : U.S. Dept. of Commerce, Patent and Trademark Office, Patent Documentation Organizations :
Subjects:	Patents > United States > Classification.

Evans: US Documents (Annex 5th floor)