ClassID:

232138

H04R2209/026 - CPC Classification

Classification description:

Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by but not provided for in any of its subgroups Transducers having separately controllable opposing diaphragms, e.g. for ring-tone and voice

Recent Application in this class:
#1
20250344024
2025-11-06

LINEAR MOTOR MAGNET ASSEMBLY AND LOUDSPEAKER UNIT

#2
20250234137
2025-07-17

SYSTEM AND METHOD FOR LOW-PROFILE AUDIO DEVICE WITH FORCE CANCELLING TRANSDUCER

#3
20250220356
2025-07-03

SYSTEMS AND METHODS FOR STABILIZING A PLAYBACK DEVICE

#4
20250159416
2025-05-15

LINEAR MOTOR MAGNET ASSEMBLY AND LOUDSPEAKER UNIT

#5
20240414480
2024-12-12

Miniature loudspeaker with radial ring magnetic circuit

#6
20240397266
2024-11-28

SPEAKER DEVICE

#7
20240223938
2024-07-04

EARPHONE CORE AND EARPHONE

#8
20240214743
2024-06-27

SPEAKER TRANSDUCER

#9
20240179473
2024-05-30

Double-sided sound device

#10
20240073615
2024-02-29

Sound device

#11
20240048915
2024-02-08

Linear motor magnet assembly and loudspeaker unit

#12
20240048914
2024-02-08

Linear motor magnet assembly and loudspeaker unit

#13
20240007796
2024-01-04

Dual function transducer

#14
20230421961
2023-12-28

Speaker devices with dual-transducers

#15
20230388701
2023-11-30

Electroacoustic Transducer

#16
20230345181
2023-10-26

Speaker transducer

#17
20230138715
2023-05-04

Loudspeaker system

#18
20220312124
2022-09-29

Speaker unit for earphone

#19
20220217471
2022-07-07

Speaker unit with dual diaphragms and dual coils

#20
20220191621
2022-06-16

Linear motor magnet assembly and loudspeaker unit

#21
20220174414
2022-06-02

Sound generator

#22
20210227331
2021-07-22

Loudpseakers

#23
20210185450
2021-06-17

Planar magnetic driver having trace-free radiant region

#24
20200107131
2020-04-02

Planar magnetic driver having trace-free radiating region

#25
20190246210
2019-08-08

Magnet assembly for a loudspeaker and loudspeaker with such a magnet assembly

#26
20160205458
2016-07-14

Earphone device having sound guiding structures

#27
20160021441
2016-01-21

Micro-speaker

#28
20150036867
2015-02-05

Acoustic transducer comprising a plurality of coaxially arranged diaphragms

#29
20140236332
2014-08-21

Digital acoustic system

#30
20140064522
2014-03-06

Speaker

#31
20130301855
2013-11-14

Spherically housed loudspeaker system

#32
20110249858
2011-10-13

MULTIFUNCTIONAL MICRO SPEAKER

#33
20110243367
2011-10-06

MULTIFUNCTIONAL MICRO SPEAKER

#34
20110096947
2011-04-28

Spherically housed loudspeaker system

#35
20090190791
2009-07-30

Acoustic transducer comprising a plurality of coaxially arranged diaphragms

#36
20090136065
2009-05-28

COMPOSITE SPEAKER AND ITS MANUFACTURING METHOD

#37
20080317255
2008-12-25

Audio Transducer Component

#38
20080044044
2008-02-21

Dual diaphragm electroacoustic transducer

#39
20070154044
2007-07-05

Spherically housed loudspeaker system

#40
20060215872
2006-09-28

Compact high performance speaker

#41
20060215870
2006-09-28

Low profile speaker and system

#42
20060153418
2006-07-13

Electroacoustic transducer mounting in shells of hearing prostheses

#43
20060120551
2006-06-08

Loudspeaker, manufacturing method thereof, and mobile telephone using the same

#44
20060094378
2006-05-04

Dual-diaphragm speaker assemblies with acoustic passageways and mobile terminals including the same

#45
20050271226
2005-12-08

Speaker

#46
18234872
2024-10-22

Force balanced acoustic transducer

#47
17106351
2022-04-05

Solid-medium sound conducting receiver and electronic device with the same