H04R9/048 - CPC Classification Index

ClassID:

231999 ⎘

H04R9/048 - CPC Classification

Classification description:

Transducers of moving-coil, moving-strip, or moving-wire type; Details; Construction, mounting, or centering of coil; Construction in which the windings of the moving coil lay in the same plane of the ribbon type

Recent Application in this class:

20220272452

2022-08-25

Directional ribbon microphone assembly

20200245073

2020-07-30

FREQUENCY RESPONSE OPTIMIZATION FOR QUASI-RIBBON AUDIO SPEAKER

20200170611

2020-06-04

Stethoscope with extended detection range

20190052956

2019-02-14

Planar loudspeaker manifold for improved sound dispersion

20180206029

2018-07-19

Planar magnetic electro-acoustic transducer having multiple diaphragms

20180077496

2018-03-15

Speaker device and microphone device

20170251318

2017-08-31

Method of forming an acoustic transducer

20170195764

2017-07-06

Microphone

20170013364

2017-01-12

Micromechanical sound transducer system and a corresponding manufacturing method

#10

20160255439

2016-09-01

Tunable ribbon microphone

#11

20160234619

2016-08-11

Sound transducer with interdigitated first and second sets of comb fingers

#12

20160198265

2016-07-07

Ribbon support system for electrodynamic microphone

#13

20160142824

2016-05-19

Knurled speaker diaphragm

#14

20150110339

2015-04-23

Planar magnetic electro-acoustic transducer having multiple diaphragms

#15

20140112504

2014-04-24

Audio driver and method for transforming an electrical signal into air movement

#16

20130121509

2013-05-16

Sound transducer with interdigitated first and second sets of comb fingers

#17

20120314887

2012-12-13

VIBRATION UNIT OF SPEAKER

#18

20120300959

2012-11-29

RIBBON MICROPHONE WITH USB OUTPUT

#19

20120269366

2012-10-25

Ribbon microphone

#20

20120230498

2012-09-13

Stereo ribbon microphone

#21

20120224727

2012-09-06

Ribbon transducer provided with dynamic tensioning system

#22

20120189145

2012-07-26

Ribbon microphone with automatic protection switch

#23

20120121110

2012-05-17

Ribbon microphone circuit

#24

20110286619

2011-11-24

Ribbon transducer with improved distortion characteristics

#25

20110261980

2011-10-27

Ribbon microphone unit with symmetrical signal paths

#26

20110188680

2011-08-04

Ribbon microphone

#27

20110164766

2011-07-07

Ribbon loudspeaker module and amplifier therefore

#28

20110158460

2011-06-30

COMPOSITE ACOUSTIC TRANSDUCERS

#29

20110091064

2011-04-21

Ribbon transducer

#30

20110038501

2011-02-17

Ribbon microphone unit and ribbon microphone

#31

20100098271

2010-04-22

Membrane or membrane configuration for an electrodynamic sound transducer, and loudspeaker comprising such a membrane or membrane configuration

#32

20090252368

2009-10-08

Ribbon transducer with improved dispersion, excursion and distortion characteristics

#33

20090245544

2009-10-01

Acoustoeletric transformation chip for ribbon microphone

#34

20090208038

2009-08-20

Ribbon for ribbon microphone, manufacturing method of the same, and ribbon microphone

#35

20090141914

2009-06-04

Ribbon microphone and ribbon microphone unit

#36

20090116670

2009-05-07

Ribbon microphone and ribbon microphone unit

#37

20080273739

2008-11-06

Ribbon transducer with improved excursion and dispersion characteristics

#38

20080152186

2008-06-26

Method of making composite acoustic transducers

#39

20070286447

2007-12-13

Speaker device

#40

20070274555

2007-11-29

Acoustic ribbon transducer arrangements

#41

20070263894

2007-11-15

Bessel line source array

#42

20070223773

2007-09-27

Methods for forming and using thin film ribbon microphone elements and the like

#43

20060078152

2006-04-13

Ribbon microphone incorporating a special-purpose transformer and/or other transducer-output circuitry

#44

20060078135

2006-04-13

Ribbon-microphone transducer

#45

20060056651

2006-03-16

Spiral ribbon speaker

#46

20050196000

2005-09-08

Moving ribbon microphone

#47

18537372

2025-07-08

Phantom powered FET circuit for audio application

#48

17533117

2023-12-26

Phantom powered FET circuit for audio application

#49

17128274

2022-04-05

Ribbon microphone

#50

16929458

2021-11-30

Phantom powered FET circuit for audio application

#51

16438262

2020-07-21

Phantom powered FET circuit for audio application

#52

15796725

2019-07-16

Phantom powered JFET circuit for audio application

#53

14887082

2018-02-06

Microphone with rounded magnet motor assembly, backwave chamber, and phantom powered JFET circuit