TY  - BOOK
ED  - Commission of the European Communities <Brussels> / Information Management
TI  - Evolution of patent filing acrtivities in the USA: a contribution to the study and assessement of technological trends in the USA from 1969 to 1974 based on a statistical analysis of patentsa 
PY  - 1980///
CY  - Brussels, 
KW  - Statistik
KW  - Patentwesen
KW  - USA
KW  - Internationale Patentklassifikation
ER  -