CPC Subgroup
H04M 1/72505 Radio link set-up procedures
Full Title
Substation equipment, e.g. for use by subscribers (subscriber services or facilities provided at exchanges H04M3/00; prepayment telephone coin boxes H04M17/00; current supply arrangements H04M19/08) > Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection > Cordless telephones (user interfaces specially adapted therefor H04M1/724) > with one base station connected to a single line > Radio link set-up procedures
3 direct subcodes
Child Classifications
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- H04M 1/72508 using a control channel
- H04M 1/72511 Searching for available channels
- H04M 1/72513 On hold, intercom or transfer communication modes
Top Applicants
Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT
- HUAWEI TECHNOLOGIES COMPANY CN 101,476
- QUALCOMM US 101,139
- SAMSUNG ELECTRONICS COMPANY KR 96,655
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 57,744
- LG ELECTRONICS KR 55,253
- HUAWEI TECHNOLOGIES COMPANY 54,181
- SONY CORPORATION JP 35,309
- ZTE CORPORATION CN 32,950
- INTEL CORPORATION US 27,533
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION CN 27,498