Concordance
Subtitle: United States patent classification to international patent classification.
Edition: 3rd ed.
Publisher: U.S. Dept. of Commerce, Patent Office, Office of Patent Classification; For sale by the Supt. of Docs., U.S. Govt. Print. Off.
Published: 1974
Place of publication: Washington, D.C
Language: eng
Number of pages: 212
Subjects: Patents -- United States -- Classification.
Other titles: United States patent classification to international patent classification.
Notes: "July 1974."