TY  - BOOK
ED  - United States Departement of Commerce <Washington> / Patent Office
TI  - catchword-Index to the second edition of the International Patent Classification
PY  - 1974///
CY  - Washington, 
KW  - Internationale Patentklassifikation
KW  - Stichwortindex
KW  - Englisch
N1  - 15.210
ER  -