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IPC Main Group
H04R 5/00

Stereophonic arrangements

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC COMMUNICATION TECHNIQUE
Subclass:
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS

Filing statistics

IPC H04R 5/00 belongs to the parent subclass H04R, which recorded 244,714 patent applications worldwide between 2013 and 2023. Annual filings grew from 13,395 in 2013 to 22,792 in 2023 (+70%), peaking at 30,255 applications in 2020. The most active applicants in class H04 are QUALCOMM (97,396 applications), HUAWEI TECHNOLOGIES COMPANY (96,502 applications) and SAMSUNG ELECTRONICS COMPANY (86,981 applications).

Source: EPO PATSTAT, worldwide filings

Additional Content

Stereophonic pick-ups, i.e. wherein signals are recorded or played back by vibration of a stylus in two orthogonal directions simultaneously , , ,

Related Keywords

stereophonic arrangements of TRANSDUCERS

4 direct subcodes

Child Classifications

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  • H04R 5/02 Spatial or constructional arrangements of loudspeakers
  • H04R 5/027 Spatial or constructional arrangements of microphones, e.g. in dummy heads
  • H04R 5/033 Headphones for stereophonic communication
  • H04R 5/04 Circuit arrangements

Top Applicants

Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. QUALCOMM US 97,396
  2. HUAWEI TECHNOLOGIES COMPANY CN 96,502
  3. SAMSUNG ELECTRONICS COMPANY KR 86,981
  4. TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
  5. HUAWEI TECHNOLOGIES COMPANY 55,349
  6. LG ELECTRONICS KR 53,649
  7. CANON 33,341
  8. SONY CORPORATION JP 32,761
  9. ZTE CORPORATION CN 32,274
  10. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327