Official catchword index to the third edition (1979) of the International patent classification
By: World Intellectual Property Organization.
Contributors: World Intellectual Property Organization.
Publisher: C. Heymanns
Published: 1979
Place of publication: München
Language: eng
Number of pages: 308
Subjects: Patents -- Classification -- Indexes
Genres: Classification
Other titles: Index to the third edition (1979) of the International patent classification