INTERNATIONAL PATENT CLASSIFICATION
(Sixth Edition)
Guide
Official Catchword Index
SECTION A
HUMAN NECESSITIES
SECTION B
PERFORMING OPERATIONS; TRANSPORTING
SECTION C
CHEMISTRY; METALLURGY
SECTION D
TEXTILES; PAPER
SECTION E
FIXED CONSTRUCTIONS
SECTION F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
SECTION G
PHYSICS
SECTION H
ELECTRICITY
Framed version
Version française