DIFF Main Group
H04R 1/00 Details of transducers,
Introduced: September 1968
Title
Titles differ between systems:
IPC: Details of transducers
CPC: Details of transducers,
Full Title
Full titles differ between systems:
IPC:
Details of transducers
CPC:
Details of transducers,
Additional Content IPC
Glossary
Casing Cabinet Cabinets Casings housing, enclosure
Limiting references
Mountings specially adapted for telephone equipment Diaphragms for electromechanical transducers Details of transducers characterised by the nature of the transducer
Of 12 combined children, 11 exist in both systems.
1 codes are CPC-only extensions.
3 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H04R 1/02 Casings; Cabinets Mountings therein (H04R1/28 takes precedence ) +5 CPC IPC+CPC Available in IPC and CPC
- H04R 1/06 Arranging circuit leads; Relieving strain on circuit leads IPC+CPC Available in IPC and CPC
- H04R 1/12 Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection IPC+CPC Available in IPC and CPC
- H04R 1/16 Mounting or connecting stylus to transducer with or without damping means IPC+CPC Available in IPC and CPC
- H04R 1/20 Arrangements for obtaining desired frequency or directional characteristics (for stereophonic purpose H04R5/00) IPC+CPC Available in IPC and CPC
- H04R 1/42 Combinations of transducers with fluid-pressure or other non-electrical amplifying means IPC+CPC Available in IPC and CPC
- H04R 1/44 Special adaptations for subaqueous use, e.g. for hydrophone IPC+CPC Available in IPC and CPC
- H04R 1/46 Special adaptations for use as contact microphones, e.g. on musical instrument, on stethoscope (throat mountings H04R1/14) 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