H04R1/2803 - CPC Classification

Classification description:

Details of transducers, loudspeakers or microphones; Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only; Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means for loudspeaker transducers

Recent Application in this class:
#1
20240121551
2024-04-11

MODULAR QUICK-CONNECT A/V SYSTEM AND METHODS THEREOF

#2
20240114287
2024-04-04

SPEAKER DEVICE

#3
20240073579
2024-02-29

ACOUSTIC OUTPUT APPARATUS

#4
20240056725
2024-02-15

Vibration transducer

#5
20240048895
2024-02-08

LOUDSPEAKER WITH REDUCED AUDIO COLORATION CAUSED BY REFLECTIONS FROM A SURFACE

#6
20240031734
2024-01-25

AUDIO OUTPUT DEVICE INCLUDING EXTENDED RESONANCE SPACE AND ELECTRONIC DEVICE INCLUDING THE SAME

#7
20240031733
2024-01-25

METHOD AND APPARATUS FOR A FRAGMENTED RADIAL SOUND BOX HUB DEVICE

#8
20230421948
2023-12-28

LOUDSPEAKER

#9
20230396912
2023-12-07

ACOUSTIC OUTPUT APPARATUS AND METHOD THEREOF

#10
20230353933
2023-11-02

SYSTEM AND METHOD FOR GENERATING AN AUDIO SIGNAL

#11
20230345171
2023-10-26

LOUDSPEAKER, MOBILE DEVICE AND METHOD OF MANUFACTURING A LOUDSPEAKER

#12
20230336902
2023-10-19

EARPHONE WITHOUT COVERING AN EAR CANAL

#13
20230319467
2023-10-05

SOUND-OUTPUT DEVICE

#14
20230292040
2023-09-14

SPEAKER ENCLOSURE ATMOSPHERIC PRESSURE EQUALIZATION

#15
20230276161
2023-08-31

ACOUSTIC OUTPUT APPARATUS

#16
20230276160
2023-08-31

ACOUSTIC OUTPUT APPARATUS

#17
20230262370
2023-08-17

Inductive acoustic filters for acoustic devices

#18
20230239607
2023-07-27

PANEL SPEAKER

#19
20230232145
2023-07-20

ACOUSTIC OUTPUT APPARATUS AND METHODS THEREOF

#20
20230229205
2023-07-20

ELECTRONIC DEVICE

#21
20230217177
2023-07-06

SPEAKER DEVICE

#22
20230209274
2023-06-29

ELECTROACOUSTIC DRIVERS AND LOUDSPEAKERS CONTAINING SAME

#23
20230209247
2023-06-29

ACOUSTIC DEVICE

#24
20230179925
2023-06-08

SPEAKERS

#25
20230179910
2023-06-08

Loudspeaker polar pattern creation procedure

#26
20230171536
2023-06-01

SOUND PRODUCTION USING SPEAKER ENCLOSURE WITH REDUCED INTERNAL PRESSURE

#27
20230171528
2023-06-01

OPEN EARPHONE

#28
20230164491
2023-05-25

Speaker

#29
20230156391
2023-05-18

Acoustic output device

#30
20230156390
2023-05-18

Acoustic output device

#31
20230145038
2023-05-11

ACOUSTIC OUTPUT DEVICE

#32
20230141946
2023-05-11

ACOUSTIC OUTPUT DEVICE

#33
20230139537
2023-05-04

ELECTRONIC DEVICE

#34
20230138715
2023-05-04

Loudspeaker system

#35
20230128617
2023-04-27

Coaxial Speaker Horn, and Coaxial Speaker

#36
20230109699
2023-04-13

Acoustic device

#37
20230108414
2023-04-06

ELECTRONIC DEVICE INCLUDING AIR VENT

#38
20230098125
2023-03-30

VEHICLE APPROACH NOTIFICATION SYSTEM AND VEHICLE APPROACH NOTIFICATION METHOD

#39
20230090109
2023-03-23

Audio Generating Arrangement and Electronic Device Comprising Such Arrangement

#40
20230082496
2023-03-16

HIGH PERFORMANCE LOUDSPEAKER ASSEMBLY

#41
20230070507
2023-03-09

ACOUSTIC OUTPUT APPARATUS AND METHOD THEREOF

#42
20230066263
2023-03-02

ACOUSTIC OUTPUT DEVICE

#43
20230030850
2023-02-02

HORN-LOADED LOUDSPEAKER

#44
20230012124
2023-01-12

ACOUSTIC OUTPUT DEVICE AND COMPONENTS THEREOF

#45
20230008436
2023-01-12

ELECTRONIC DEVICE AND SPEAKER MODULE

#46
20230007404
2023-01-05

VIBRATION APPARATUS AND APPARATUS AND VEHICULAR APPARATUS COMPRISING THE SAME

#47
20230007388
2023-01-05

Electronic device

#48
20230007380
2023-01-05

Acoustic output apparatus

#49
20220408172
2022-12-22

ACOUSTIC OUTPUT APPARATUS

#50
20220394378
2022-12-08

ENHANCING A LISTENING EXPERIENCE BY ADJUSTING PHYSICAL ATTRIBUTES OF AN AUDIO PLAYBACK SYSTEM BASED ON DETECTED ENVIRONMENTAL ATTRIBUTES OF THE SYSTEM'S ENVIRONMENT

#51
20220394365
2022-12-08

ELECTROACOUSTIC DRIVERS AND LOUDSPEAKERS CONTAINING SAME

#52
20220386020
2022-12-01

HOLOGRAPHIC-BASED DIRECTIONAL SOUND DEVICE

#53
20220386012
2022-12-01

Acoustic output apparatus

#54
20220345810
2022-10-27

Speaker box

#55
20220345809
2022-10-27

Acoustic adapter for a loudspeaker driver

#56
20220337938
2022-10-20

Modular quick-connect A/V system and methods thereof

#57
20220312108
2022-09-29

SYSTEMS, METHODS, AND DEVICES FOR ACOUSTIC OUTPUT

#58
20220303679
2022-09-22

SOUND OUTPUT DEVICE

#59
20220270585
2022-08-25

Earpiece device

#60
20220270577
2022-08-25

DEVICE AND ELECTRONIC MUSICAL INSTRUMENT

#61
20220264212
2022-08-18

Open earphone

#62
20220248133
2022-08-04

Sound-output device

#63
20220232311
2022-07-21

Loudspeaker polar pattern creation procedure

#64
20220219587
2022-07-14

HEAD RESTRAINT

#65
20220201397
2022-06-23

NOISE CANCELING AUDIO IN/OUT DEVICE

#66
20220179243
2022-06-09

Eyewear with parametric audio unit

#67
20220174403
2022-06-02

Speaker module and wearable device

#68
20220174399
2022-06-02

Loudspeaker with reduced audio coloration caused by reflections from a surface

#69
20220174396
2022-06-02

ACOUSTIC TRANSDUCER AND ELECTRONIC DEVICE HAVING SLIM SPEAKER

#70
20220116698
2022-04-14

Sound transmission holder and related speaker assembly electronic device

#71
20220103932
2022-03-31

Speaker apparatus and acoustic system

#72
20220086561
2022-03-17

Headphone earcup with adsorptive material

#73
20220070576
2022-03-03

Compact speaker

#74
20220070570
2022-03-03

Acoustic output device and noise reduction and sound transmission device

#75
20220053269
2022-02-17

Single transducer audio in/out device

#76
20220053261
2022-02-17

Loudspeaker

#77
20220046351
2022-02-10

Headphone and grille unit

#78
20220030347
2022-01-27

Acoustic output apparatus

#79
20220021963
2022-01-20

Acoustic output apparatus and methods thereof

#80
20210409875
2021-12-30

Sound-output device

#81
20210400377
2021-12-23

Speaker

#82
20210392422
2021-12-16

Electronic device

#83
20210389797
2021-12-16

Electrical connectors for electronic devices

#84
20210389796
2021-12-16

Electronic device architecture and components

#85
20210377679
2021-12-02

Acoustic testing method and acoustic testing system thereof

#86
20210377660
2021-12-02

SOUND-OUTPUT DEVICE

#87
20210377645
2021-12-02

Acoustic output apparatus and method thereof

#88
20210352399
2021-11-11

Method, system and devices for selective modal control for vibrating structures

#89
20210329378
2021-10-21

Sound-output device

#90
20210314685
2021-10-07

Portable electronic device

#91
20210312153
2021-10-07

Portable electronic device

#92
20210289281
2021-09-16

Acoustic output apparatus

#93
20210274281
2021-09-02

Acoustic output apparatus

#94
20210274280
2021-09-02

Acoustic output device and buttons thereof

#95
20210274278
2021-09-02

Acoustic output apparatus

#96
20210274276
2021-09-02

Earphone without covering an ear canal

#97
20210266654
2021-08-26

Earphone including tuning means

#98
20210243518
2021-08-05

Acoustic output device and components thereof

#99
20210235181
2021-07-29

Acoustic output apparatus

#100
20210227307
2021-07-22

SUPPORT BASE AND DISPLAY DEVICE

#101
20210227306
2021-07-22

Audio glasses

#102
20210223577
2021-07-22

Acoustic output device

#103
20210204055
2021-07-01

Miniature loudspeaker module

#104
20210195318
2021-06-24

Sound production using speaker enclosure with reduced internal pressure

#105
20210185444
2021-06-17

Grill-integrated low-pass filter and speaker including the same

#106
20210185421
2021-06-17

Acoustic output apparatus with a plurality of acoustic drivers and methods thereof

#107
20210168500
2021-06-03

Acoustic output apparatus

#108
20210168498
2021-06-03

Acoustic output apparatus with drivers in multiple frequency ranges and bluetooth low energy receiver

#109
20210168495
2021-06-03

Acoustic output apparatus

#110
20210168485
2021-06-03

Open earphone

#111
20210160610
2021-05-27

Acoustic output apparatus and methods thereof

#112
20210160606
2021-05-27

Open earphone

#113
20210160602
2021-05-27

Acoustic device

#114
20210152774
2021-05-20

Terminal device and method for outputting audio

#115
20210136472
2021-05-06

Recording high output power levels of sound at low sound pressure levels

#116
20210127200
2021-04-29

Acoustic output device

#117
20210127197
2021-04-29

Acoustic output apparatus

#118
20210112329
2021-04-15

Open earphone

#119
20210099790
2021-04-01

Speaker

#120
20210067864
2021-03-04

Reinforced actuators for distributed mode loudspeakers

#121
20200413170
2020-12-31

Balanced stereo headphones with un-balanced air chambers

#122
20200404420
2020-12-24

Doppler compensation in coaxial and offset speakers

#123
20200382860
2020-12-03

Modular quick-connect A/V system and methods thereof

#124
20200359129
2020-11-12

Acoustic device

#125
20200355110
2020-11-12

Method and apparatus for producing stratified streams

#126
20200351581
2020-11-05

Enhancing a listening experience by adjusting physical attributes of an audio playback system based on detected environmental attributes of the system's environment

#127
20200329301
2020-10-15

Opposing loudspeaker arrangement

#128
20200314554
2020-10-01

Electronic device and control method thereof

#129
20200296514
2020-09-17

DEVICE, SYSTEM AND METHOD FOR SERVO-CONTROLLED AUDIO SPEAKER

#130
20200280798
2020-09-03

Reinforced actuators for distributed mode loudspeakers

#131
20200280797
2020-09-03

Hanging speaker system

#132
20200280777
2020-09-03

Speaker device and enclosure

#133
20200228891
2020-07-16

Hanging speaker system

#134
20200221216
2020-07-09

Loudspeaker with reduced audio coloration caused by reflections from a surface

#135
20200204906
2020-06-25

Speaker box

#136
20200196046
2020-06-18

Electronic device including acoustic module

#137
20200186912
2020-06-11

AUDIO HEADSET DEVICE

#138
20200155793
2020-05-21

MULTIFUNCTIONAL ENTERTAINMENT, PHYSIOTHERAPY AND HEALTH-CARE DEVICE BASED ON CLOUD PLATFORM AND BUS STRUCTURE

#139
20200154186
2020-05-14

Outlet receptacle cover and mode throttling system

#140
20200137482
2020-04-30

Sound generator for mobile entities

#141
20200120427
2020-04-16

Method, system and devices for selective modal control for vibrating structures

#142
20200120426
2020-04-16

Method and device for force concentration to enhance sound from flat panel loudspeakers

#143
20200112784
2020-04-09

Device for controlling a loudspeaker and associated sound reproduction facility

#144
20200092635
2020-03-19

External speaker assembly and audio apparatus

#145
20200068281
2020-02-27

Dual-mode acoustic radiator speaker system

#146
20200053452
2020-02-13

Sound production using speaker enclosure with reduced internal pressure

#147
20200037062
2020-01-30

Sound absorbing material and speaker box using same

#148
20200029141
2020-01-23

Expansion device having a speaker

#149
20200021906
2020-01-16

Loudspeaker

#150
20190364369
2019-11-28

Electro-acoustic transducer for open audio device

#151
20190349656
2019-11-14

Dual-mode acoustic radiator speaker system

#152
20190327544
2019-10-24

Electronic device with speaker module

#153
20190313194
2019-10-10

Distributed mode loudspeaker electromagnetic actuator with axially and radially magnetized circuit

#154
20190258293
2019-08-22

Mobile terminal sending out sound via multifunctional battery cover and method thereof

#155
20190253788
2019-08-15

BUMPOUT MOTORIZED EXPANSION SYSTEM

#156
20190246202
2019-08-08

Adjustable acoustic interface loudspeaker

#157
20190238987
2019-08-01

Acoustic device

#158
20190238975
2019-08-01

Audio source waveguide

#159
20190238973
2019-08-01

Audio play apparatus and device

#160
20190228395
2019-07-25

Audio signal control apparatus and method thereof

#161
20190208297
2019-07-04

Loudspeaker grilles

#162
20190200116
2019-06-27

Loudspeaker, mobile device and method of manufacturing a loudspeaker

#163
20190200115
2019-06-27

Earcushion with acoustic tube

#164
20190193612
2019-06-27

Headrest speakers with asymmetric radiation patterns

#165
20190189096
2019-06-20

Instrument speaker art

#166
20190182585
2019-06-13

ACOUSTIC LAYER IN MEDIA DEVICE PROVIDING ENHANCED AUDIO PERFORMANCE

#167
20190182581
2019-06-13

Speaker module

#168
20190166419
2019-05-30

Apparatus and method for outputting audio signal, and display apparatus using the same

#169
20190141436
2019-05-09

Sound absorbing assembly for speaker module and speaker module

#170
20190132668
2019-05-02

Sound reproduction system, mobile object, and sound reproduction method

#171
20190082245
2019-03-14

Removable cartridge for insertion into portable communications device

#172
20190069108
2019-02-28

Compact public address access point apparatuses

#173
20190058933
2019-02-21

Speaker module

#174
20190052943
2019-02-14

Loudspeaker

#175
20190045284
2019-02-07

Recording high output power levels of sound at low sound pressure levels

#176
20190014417
2019-01-10

Speaker box

#177
20190014406
2019-01-10

Speaker box

#178
20180359557
2018-12-13

Multi-function control of one or several multimedia playback devices

#179
20180358943
2018-12-13

Audio playback device and audio control circuit of the same

#180
20180354862
2018-12-13

Sound absorption material preparation method, sound absorption material and filling method thereof

#181
20180343509
2018-11-29

Speaker system

#182
20180332384
2018-11-15

Modular quick-connect A/V system and methods thereof

#183
20180310092
2018-10-25

Ultrathin acoustic impedance converter

#184
20180310086
2018-10-25

Loudspeaker system

#185
20180302731
2018-10-18

Sound-absorbing material, sound-absorbing particle and speaker module manufacturing process, particle and module

#186
20180288522
2018-10-04

Loudspeaker apparatus

#187
20180288521
2018-10-04

Device and loudspeaker cabinet

#188
20180270569
2018-09-20

System and method for a loudspeaker with a diaphragm

#189
20180267093
2018-09-20

Disconnection detecting device, signal processing unit and disconnection detection method

#190
20180213321
2018-07-26

Vibration inducing tactile apparatus

#191
20180192184
2018-07-05

Outdoor speaker assembly and system

#192
20180184205
2018-06-28

Ear unit and portable sound device

#193
20180184192
2018-06-28

Earphone

#194
20180184182
2018-06-28

Sound bar apparatus having detachable sound transducer

#195
20180146282
2018-05-24

Loudspeaker with a gas adsorbing material and mobile device comprising a loudspeaker

#196
20180146281
2018-05-24

Loudspeaker, loudspeaker driver and loudspeaker design process

#197
20180132035
2018-05-10

Loudspeaker module

#198
20180124520
2018-05-03

Frameless audio transducer for mobile applications including optionally supported coil wire and leads

#199
20180098140
2018-04-05

Speaker grill with graduated hole sizing over a transition area for a media device

#200
20180077485
2018-03-15

Loudspeaker system

#201
20180070168
2018-03-08

Loudspeaker module

#202
20180070167
2018-03-08

Wideband slot-loading loudspeaker

#203
20180063631
2018-03-01

Shutter covered on sound hole of loudspeaker module and assembling method thereof, loudspeaker module

#204
20180041829
2018-02-08

Outdoor speaker assembly and system

#205
20180035199
2018-02-01

Loudspeaker module and electronic product

#206
20180027321
2018-01-25

Loudspeaker enclosure with a sealed acoustic suspension chamber

#207
20180007471
2018-01-04

Electrodynamic Transducer in Ultrasonic Mode

#208
20180007463
2018-01-04

Speaker device for improving sound quality in high frequency band

#209
20170353783
2017-12-07

Thin speaker module with a front acoustic cavity

#210
20170332164
2017-11-16

Audio layer in keyboard device providing enhanced audio performance

#211
20170322307
2017-11-09

Apparatus for sounding the atmosphere and method

#212
20170295424
2017-10-12

SOUND GENERATING DEVICE

#213
20170280231
2017-09-28

Loudspeaker with reduced audio coloration caused by reflections from a surface

#214
20170280230
2017-09-28

Wearable device with sound sealing structure

#215
20170257469
2017-09-07

Audio transducer and associated holding device for enhanced acoustic and electromagnetic coupling

#216
20170251289
2017-08-31

Outlet receptacle cover and mode throttling system

#217
20170230756
2017-08-10

MEMS LOUDSPEAKER DEVICE AND CORRESPONDING MANUFACTURING METHOD

#218
20170208405
2017-07-20

PROGRAMMABLE DIGITAL SOUND REPRODUCTION NETWORK

#219
20170208388
2017-07-20

Speaker system and electronic device using same

#220
20170195780
2017-07-06

Earphone device that switched to an open-type or a closed-type earphone device

#221
20170188134
2017-06-29

Reducing ported transducer array enclosure noise

#222
20170180872
2017-06-22

Fluid diode loudspeaker

#223
20170180846
2017-06-22

Conformable adaptors for diffraction slots in speakers

#224
20170126867
2017-05-04

Audio transducer and associated holding device for enhanced acoustic and electromagnetic coupling

#225
20170118548
2017-04-27

EARTIP AND EARPHONE DEVICE USING THE SAME

#226
20170111739
2017-04-20

Method and portable electronic apparatus for adaptively adjusting playback effect of speakers

#227
20170111019
2017-04-20

LOW FREQUENCY EQUALIZATION FOR LOUDSPEAKER SYSTEM

#228
20170099536
2017-04-06

ELECTROACOUSTIC TRANSDUCER WITH FLEXIBLE COILWIRE CONNECTION

#229
20170094403
2017-03-30

Acoustic filter for omnidirectional loudspeaker

#230
20170078810
2017-03-16

Compact public address access point apparatuses

#231
20170055065
2017-02-23

Speaker sound hole device

#232
20170055054
2017-02-23

Speaker device

#233
20170026756
2017-01-26

Speaker

#234
20170026755
2017-01-26

Speaker

#235
20170026726
2017-01-26

Speaker apparatus and electronic apparatus including same

#236
20170013367
2017-01-12

Speaker

#237
20170013366
2017-01-12

Acoustic transducer

#238
20170013350
2017-01-12

Material for rapid gas sorption in loudspeakers

#239
20160360312
2016-12-08

Dynamic acoustic waveguide

#240
20160353191
2016-12-01

Customizable headphone audio driver assembly, headphone including such an audio driver assembly, and related methods

#241
20160332583
2016-11-17

Acoustic enclosure for motor vehicle

#242
20160330542
2016-11-10

Customization earphone structure and detachable audio broadcasting module thereof

#243
20160309254
2016-10-20

Acoustic sound adsorption material having attached sphere matrix

#244
20160302001
2016-10-13

DISPOSABLE HEADSET PROTECTOR

#245
20160286304
2016-09-29

ACOUSTIC TRANSDUCER INCLUDING AIRFOIL FOR GENERATING SOUND

#246
20160286303
2016-09-29

Acoustic device

#247
20160277835
2016-09-22

Electronic device and method of controlling the same

#248
20160269819
2016-09-15

Modular quick-connect A/V system and methods thereof

#249
20160269812
2016-09-15

Modular quick-connect A/V system and methods thereof

#250
20160255437
2016-09-01

LED lighting device and speaker

#251
20160255430
2016-09-01

Acoustic device and headrest

#252
20160249136
2016-08-25

LOUDSPEAKER AND LOUDSPEAKER DRIVER

#253
20160249130
2016-08-25

Speaker baffle

#254
20160232885
2016-08-11

Perforation acoustic muffler assembly and method of reducing noise transmission through objects

#255
20160212523
2016-07-21

Acoustic waveguide

#256
20160192075
2016-06-30

Speaker and vibration control unit

#257
20160192046
2016-06-30

Loudspeaker box arrangement and loudspeaker box

#258
20160174002
2016-06-16

Miniature speaker and speaker cabinet and hearing aid

#259
20160173972
2016-06-16

Sealed speaker system having a pressure vent

#260
20160157004
2016-06-02

Earphone with at least one air orifice

#261
20160150313
2016-05-26

Actively suspended seat with bass loudspeakers

#262
20160127824
2016-05-05

Woofer speaker and the rear sound cavity forming method thereof

#263
20160127821
2016-05-05

Acoustic system having a housing with adsorbent powder

#264
20160088385
2016-03-24

Shutter covered on sound hole of loudspeaker module and assembling method thereof, loudspeaker module

#265
20160080869
2016-03-17

Flat plate-type bass loudspeaker

#266
20160080857
2016-03-17

Three-dimensional air-adsorbing structure

#267
20160050478
2016-02-18

Canalphone sizing system and method

#268
20160044403
2016-02-11

Speaker cabinet

#269
20160037253
2016-02-04

PORTABLE SPEAKER SYSTEM

#270
20160021453
2016-01-21

Apparatus for use in portable devices

#271
20160014499
2016-01-14

Acoustic filter

#272
20160007110
2016-01-07

Earpiece positioning and retaining

#273
20150382103
2015-12-31

Phi-Based Enclosure for Speaker Systems

#274
20150381783
2015-12-31

Portable electronic device

#275
20150373451
2015-12-24

Display device

#276
20150319517
2015-11-05

Loudspeaker system with improved sound

#277
20150314263
2015-11-05

Loudspeaker system with improved sound

#278
20150304748
2015-10-22

Loudspeaker

#279
20150271594
2015-09-24

Loudspeaker with pressure compensation element

#280
20150271592
2015-09-24

Loudspeaker system with improved sound

#281
20150271581
2015-09-24

Packaging of acoustic volume increasing materials for loudspeaker devices

#282
20150271580
2015-09-24

Loudspeaker system with improved sound

#283
20150271579
2015-09-24

Packaging of acoustic volume increasing materials for loudspeaker devices

#284
20150156581
2015-06-04

Tactile low frequency transducer

#285
20150156580
2015-06-04

Back cavity microphone implementation

#286
20150129351
2015-05-14

Dynamic acoustic waveguide

#287
20150098601
2015-04-09

Apparatus for enhancing sound from portable devices

#288
20150072723
2015-03-12

Speaker with grained zeolite material in deep-drawn foil resonance volume

#289
20150068402
2015-03-12

Three-dimensional air-adsorbing structure

#290
20150063621
2015-03-05

Speaker assembly

#291
20150063595
2015-03-05

SPEAKER APPARATUS

#292
20150049895
2015-02-19

Expandable speaker

#293
20150036863
2015-02-05

LED lighting device and speaker

#294
20150036840
2015-02-05

Loudspeaker system for a motor vehicle

#295
20140376759
2014-12-25

LOUDSPEAKER HAVING CARBON NANOTUBES

#296
20140355810
2014-12-04

Plug earphone or a concha earphone

#297
20140341412
2014-11-20

Portable electronic device with enhanced sound reproduction

#298
20140334659
2014-11-13

Loudspeaker for eliminating a frequency response dip

#299
20140311820
2014-10-23

Three-dimensional air-adsorbing structure

#300
20140294220
2014-10-02

Loudspeaker unit with two loudspeakers and a wedge-shaped body between the spaces adjoining the loudspeakers