DIFF Subgroup
H04R 17/04 Gramophone pick-ups using a stylus; Recorders using a stylus
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Piezoelectric transducers; Electrostrictive transducers > Gramophone pick-ups using a stylus; Recorders using a stylus
CPC:
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
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H04R 17/06 comprising two or more styli or transducers (H04R17/08 takes precedence) IPC+CPC Available in IPC and CPC
- H04R 17/08 signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class H04,2013–2023, worldwide · Source: EPO PATSTAT
- QUALCOMM US 97,396
- HUAWEI TECHNOLOGIES COMPANY CN 96,502
- SAMSUNG ELECTRONICS COMPANY KR 86,981
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
- HUAWEI TECHNOLOGIES COMPANY 55,349
- LG ELECTRONICS KR 53,649
- CANON 33,341
- SONY CORPORATION JP 32,761
- ZTE CORPORATION CN 32,274
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327
Top Applicants (CPC)
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