Patents-Review.com
ClassID:

231993 ⎘

H04R9/041 - CPC Classification

Classification description:

Transducers of moving-coil, moving-strip, or moving-wire type; Details; Construction, mounting, or centering of coil Centering

Sub-classes:
Recent Application in this class:
#1
20260012733
2026-01-08

STIFFNESS REDUCTION HINGES FOR AUDIO SPEAKERS

 #2
20240365067
2024-10-31

TRANSDUCERS, LOUDSPEAKERS, AND ACOUSTIC OUTPUT DEVICES

 #3
20240340592
2024-10-10

SPEAKER

 #4
20240236576
2024-07-11

A FULL-FREQUENCY BAND HIGH QUALITY SPEAKER WITH A BAR AND SOUND TUNNELS

 #5
20240137705
2024-04-25

Full-frequency band high quality speaker with a bar and sound tunnels

 #6
20230345180
2023-10-26

Electroacoustic drivers and loudspeakers containing same

 #7
20230328448
2023-10-12

Electroacoustic drivers and loudspeakers containing same

 #8
20230247364
2023-08-03

Electroacoustic drivers and loudspeakers containing same

 #9
20230217183
2023-07-06

Electroacoustic drivers and loudspeakers containing same

 #10
20230209274
2023-06-29

Electroacoustic drivers and loudspeakers containing same

 #11
20230199403
2023-06-22

Electroacoustic drivers and loudspeakers containing same

 #12
20230199401
2023-06-22

Force transducers for electroacoustic drivers and loudspeakers containing same

 #13
20230094106
2023-03-30

Sound output equipment and display device

 #14
20230019916
2023-01-19

Loudspeaker with a fin-reinforced voice coil structure

 #15
20220377464
2022-11-24

Sound-producing device

 #16
20220345822
2022-10-27

Electrodynamic drive for flat loudspeaker systems

 #17
20220046359
2022-02-10

Speaker

 #18
20210377664
2021-12-02

Planar loudspeaker

 #19
20210120344
2021-04-22

Electro-acoustic transducer diaphragm with integrated structural features, and related systems and methods

 #20
20210037329
2021-02-04

Position sensor for a voice coil

 #21
20200275211
2020-08-27

TRANSDUCER AND METHOD OF OPERATION

 #22
20200213761
2020-07-02

Speaker

 #23
20200213752
2020-07-02

Speaker

 #24
20200045445
2020-02-06

Speaker

 #25
20190342667
2019-11-07

Speaker with hidden folding ring

 #26
20190141453
2019-05-09

DIFFERENTIAL SPEAKER APPARATUS HAVING MOTION FEEDBACK FUNCTION

 #27
20190131859
2019-05-02

Linear actuator

 #28
20190124449
2019-04-25

Loudspeaker with closed membrane and relative assembly method

 #29
20190124437
2019-04-25

Damper and speaker apparatus

 #30
20190037317
2019-01-31

Transducer and method of operation

 #31
20180332398
2018-11-15

Electrodynamic acoustic transducer with conductive membrane for coil connection

 #32
20180302723
2018-10-18

Miniature speaker

 #33
20180288530
2018-10-04

Loudspeaker

 #34
20180288529
2018-10-04

Loudspeaker with vibration control system

 #35
20180109878
2018-04-19

Loudspeaker motor and suspension system

 #36
20170238086
2017-08-17

Damper and speaker apparatus

 #37
20170171662
2017-06-15

Acoustic transducer systems with tilt control

 #38
20170127186
2017-05-04

Speaker with a coil stabilizer and method for manufacturing the same

 #39
20170070823
2017-03-09

Speaker driver

 #40
20160183018
2016-06-23

Method and apparatus for coil alignment in electromagnetic hearing implant

 #41
20160165335
2016-06-09

Loudspeaker with a helmholtz resonator

 #42
20160112805
2016-04-21

Transducer and method of operation

 #43
20160080869
2016-03-17

Flat plate-type bass loudspeaker

 #44
20150146912
2015-05-28

Moving-coil electroacoustic transducer

 #45
20150086963
2015-03-26

Audio demonstration kit

 #46
20150055818
2015-02-26

Speaker structure

 #47
20140321690
2014-10-30

Double coil speaker

 #48
20140102825
2014-04-17

Speaker damper and manufacturing method of the same

 #49
20140016809
2014-01-16

Micro converter, audio device and hearing aid

 #50
20130266173
2013-10-10

Low-profile speaker

 #51
20130216046
2013-08-22

Narrow directional stereo microphone

 #52
20130136295
2013-05-30

Loudspeaker Based on "The Principle of The Center Of Percussion."

 #53
20120109029
2012-05-03

VIBRATION TRANSDUCER AND SOMATOSENSORY VIBRATION DEVICE HAVING VIBRATION TRANSDUCER

 #54
20120039494
2012-02-16

Loudspeakers

 #55
20110268310
2011-11-03

Loudspeaker with an inverted motor

 #56
20110176703
2011-07-21

SPEAKER DEVICE

 #57
20110135111
2011-06-09

SPEAKER DEVICE AND AUTOMOBILE

 #58
20110075880
2011-03-31

SPEAKER DAMPER AND SPEAKER INCLUDING THE SAME

 #59
20100266154
2010-10-21

Structure of speaker

 #60
20100195863
2010-08-05

SPEAKER

 #61
20090316949
2009-12-24

Electrodynamic loudspeaker device

 #62
20090226027
2009-09-10

Structure of a voice coil assembly

 #63
20090175486
2009-07-09

SPEAKER

 #64
20090022356
2009-01-22

Electro-acoustic transducer

 #65
20080285788
2008-11-20

Electrodynamic transducer including a dome with a ferrofluid suspension

 #66
20080085017
2008-04-10

Loudspeaker and microphone based on the principle of "The Center of Percussion"

 #67
20070189577
2007-08-16

Ferrofluid centered voice coil speaker

 #68
20070125591
2007-06-07

Audio speaker with wobble free voice coil movement

 #69
20070116322
2007-05-24

Speaker apparatus

 #70
20060285718
2006-12-21

Speaker

 #71
20060233416
2006-10-19

Loudspeaker including a cone circumscribed by a stiffener

 #72
20060191741
2006-08-31

Speaker

 #73
20050141746
2005-06-30

Speaker apparatus

 #74
20050105758
2005-05-19

Audio speaker and method for assembling an audio speaker

 #75
20050047626
2005-03-03

Adjustable loudspeaker

 #76
20050047625
2005-03-03

Speakers

 #77
17953542
2023-03-21

Electrodynamic actuator for acoustic oscillations