TY  - BOOK
ED  - Patent and Trademark Office <Washington>
TI  - Concordance: United States Patent Classification to International Patent Classification
SN  - 0-16-050220-9
PY  - 2000///
CY  - Washington, 
KW  - USA
KW  - Patentklassifikation
KW  - Konkordanz
KW  - Internationale Patentklassifikation
ER  -