TY  - BOOK
ED  - World Intellectual Property Organization (WIPO) <Geneva>
TI  - Official Catchword Index to the fourth edition (1984) of the International Patent Classification
PY  - 1984///
CY  - München: 
PB  - Heymann, 
KW  - Internationale Patentklassifikation
KW  - Stichwortindex
KW  - Englisch
N1  - 18.579, 18.806, 18.811
ER  -