CPC Main Group
H04M 11/00 Telephonic communication systems specially adapted for combination with other electrical systems
7 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- H04M 11/02 with bell or annunciator systems
- H04M 11/04 with alarm systems, e.g. fire, police or burglar alarm systems
- H04M 11/06 Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M 11/08 specially adapted for optional reception of entertainment or informative matter
- H04M 11/10 with dictation recording and playback systems
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