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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H04M15/04
Recording calls; , or communications; in printed, perforated or other permanent form
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H04M15/06
Recording class or number of calling; , i.e. A-party; or called party; , i.e. B-party
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