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CPC Subgroup
H04R 17/04

Gramophone pick-ups using a stylus; Recorders using a stylus

Full Title

Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners ) > Gramophone pick-ups using a stylus; Recorders using a stylus

2 direct subcodes

Child Classifications

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  • H04R 17/06 comprising two or more styli or transducers (H04R17/08 takes precedence)
  • H04R 17/08 signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

Top Applicants

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

  1. HUAWEI TECHNOLOGIES COMPANY CN 101,476
  2. QUALCOMM US 101,139
  3. SAMSUNG ELECTRONICS COMPANY KR 96,655
  4. TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 57,744
  5. LG ELECTRONICS KR 55,253
  6. HUAWEI TECHNOLOGIES COMPANY 54,181
  7. SONY CORPORATION JP 35,309
  8. ZTE CORPORATION CN 32,950
  9. INTEL CORPORATION US 27,533
  10. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION CN 27,498