Concordance
Subtitle: United States patent classification to international patent classification.
Edition: 4th ed.
Publisher: Dept. of Commerce, Patent and Trademark Office, Patent Documentation Organizations : for sale by the Supt. of Docs., U.S. Govt. Print. Off.
Published: 1979
Place of publication: [Arlington, Va.]
Language: eng
Number of pages: 148
Subjects: Patents -- United States -- Classification.
Genres: Classification.
Other titles: United States patent classification to international patent classification.
Notes: Jan. 1980.

Tables.