Evolution of patent filing activities in the USA
Subtitle: a contribution to the study and assessement of technological trends in the USA from 1969 to 1974, based on a statistical analysis of patents
By: H. Grevink and H. Kronz.
Contributors: Kronz, H.; Commission of the European Communities. Directorate-General Scientific and Technical Information and Information Management.
Series: Information management series; EUR 6575EN
Publisher: Office for Official Publications of the European Communities
Published: 1980
Place of publication: Luxembourg
Language: eng