CPC Main Group Additional Only
H04Q 2213/00 Indexing scheme relating to selecting arrangements in general and for multiplex systems
445 direct subcodes
Child Classifications
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- H04Q 2213/001 Motorselectors
- H04Q 2213/002 Graphical representation
- H04Q 2213/003 Constructional details
- H04Q 2213/011 Periodic optical structures, e.g. gratings, holograms
- H04Q 2213/012 Tunable opticalo systems
- H04Q 2213/013 Optical shutters, e.g. LCD arrays
- H04Q 2213/014 Optical storage, not delay lines
- H04Q 2213/015 3D-optical arrangement
- H04Q 2213/016 Optical subcarrier modulation
- H04Q 2213/017 Optical polarisation
- H04Q 2213/02 Relay switches
- H04Q 2213/03 PAM
- H04Q 2213/031 PCM
- H04Q 2213/032 Delta modulation
- H04Q 2213/033 Other modulation methods
- H04Q 2213/034 Codec; PCM compression
- H04Q 2213/036 Series parallel conversion; Parallel bit transmission
- H04Q 2213/037 Resonant transfer; Sample and hold
- H04Q 2213/038 Optical modulation
- H04Q 2213/04 Coordinate switches; Crossbar switches
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