CPC Main Group Additional Only
H04M 2201/00 Electronic components, circuits, software, systems or apparatus used in telephone systems
27 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- H04M 2201/02 Diodes
- H04M 2201/04 Transistors
- H04M 2201/06 Integrated circuits
- H04M 2201/08 Magnetic elements
- H04M 2201/10 Logic circuits
- H04M 2201/12 Counting circuits
- H04M 2201/14 Delay circuits; Timers
- H04M 2201/16 Sequence circuits
- H04M 2201/18 Comparators
- H04M 2201/20 Scanners
- H04M 2201/22 Synchronisation circuits
- H04M 2201/26 A/D convertors
- H04M 2201/28 S/P convertors
- H04M 2201/30 PCM
- H04M 2201/32 Personal computers
- H04M 2201/34 Microprocessors
- H04M 2201/36 Memories
- H04M 2201/38 Displays
- H04M 2201/39 using speech synthesis
- H04M 2201/40 using speech recognition
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