Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04M
TELEPHONIC COMMUNICATION
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15/00
Arrangements for metering, time-control or time indication; ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
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H04M15/32
Charging, billing or; metering arrangements for satellites or concentrators which connect one or more exchange lines with a group of local lines
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