Concordance, United States patent classification to international patent classification.
Edition: 1990 ed.
Publisher: U.S. Dept. of Commerce, Patent and Trademark Office, Patent Documentation Organizations
Published: 1990
Place of publication: [Washington, D.C.]
Language: eng
Number of pages: 184
Subjects: Patents -- United States -- Classification.
Other titles: United States patent classification to international patent classification.
Notes: Cover title: United States patent classification to international patent classification.
Shipping list no.: 90-290-P.
S/N 003-004-00643-9
Item 254-A