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COOPERATIVE PATENT CLASSIFICATION
A
HUMAN NECESSITIES
B
PERFORMING OPERATIONS; TRANSPORTING
C
CHEMISTRY; METALLURGY
D
TEXTILES; PAPER
E
FIXED CONSTRUCTIONS
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
G
PHYSICS
H
ELECTRICITY
Y
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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