Normale Ansicht MARC ISBD

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 / Mitarb.: Hans Grevnik ; Hermann Kronz - IV, 132 S.

Subjects--Topical Terms:
Statistik
Patentwesen
USA
Internationale Patentklassifikation