Patent classifications
H
ELECTRICITY
Load children
H04
ELECTRIC COMMUNICATION TECHNIQUE
Load children
H04M
TELEPHONIC COMMUNICATION
Load children
2203/00
Aspects of automatic or semi-automatic exchanges
Load children Filter patents View analytics View as hierarchy Open in page
H04M2203/35
related to information services provided via a voice call
Load children Filter patents View analytics View as hierarchy Open in page
Sorry, no patents found.