Patents-Review.com
ClassID:

220230 ⎘

H03G3/04 - CPC Classification

Classification description:

Gain control in amplifiers or frequency changers without distortion of the input signal; Manually-operated control in untuned amplifiers

Sub-classes:
Recent Application in this class:
#1
20260003565
2026-01-01

Control Based On Proximity

 #2
20250231734
2025-07-17

Volume Limit

 #3
20240143273
2024-05-02

Volume limit

 #4
20240078081
2024-03-07

Command Dial in a Media Playback System

 #5
20230111138
2023-04-13

Control Based On Proximity

 #6
20220229627
2022-07-21

Control based on proximity

 #7
20220091813
2022-03-24

Command dial in a media playback system

 #8
20210103424
2021-04-08

Volume limit

 #9
20200389143
2020-12-10

Automatic calibration of an ambient noise compensation system

 #10
20200241836
2020-07-30

Control based on proximity

 #11
20200201597
2020-06-25

Command dial in a media playback system

 #12
20200052667
2020-02-13

MOBILE TERMINAL AND CONTROL METHOD THEREOF

 #13
20200012477
2020-01-09

Audio device, audio system, and volume value control method

 #14
20190278558
2019-09-12

Volume limit

 #15
20190149114
2019-05-16

Speaker volume preference learning

 #16
20190068151
2019-02-28

Amplification circuit with read/write circuit

 #17
20190018642
2019-01-17

Portable computing devices and command input methods for the portable computing devices

 #18
20190007773
2019-01-03

Sound equipment, lock release method, and medium

 #19
20180358946
2018-12-13

Audio device and control method for an audio device

 #20
20180349089
2018-12-06

Command device to control a synchrony group

 #21
20180321900
2018-11-08

Control based on proximity

 #22
20180278223
2018-09-27

Speaker volume preference learning

 #23
20180234067
2018-08-16

Calibration method and computer readable recording medium

 #24
20180225085
2018-08-09

Volume limit

 #25
20180219521
2018-08-02

Sound processing device and sound processing method

 #26
20180206026
2018-07-19

Powered speaker system and method

 #27
20180175815
2018-06-21

Sound signal processing apparatus and imaging device using same

 #28
20170361770
2017-12-21

VEHICLE HORN DEVICE AND METHOD

 #29
20170353168
2017-12-07

Satellite microphone assembly

 #30
20170317655
2017-11-02

Satellite microphone assembly

 #31
20170046122
2017-02-16

Audio device, audio system, and volume value control method

 #32
20170042270
2017-02-16

Combination knitted hat and earphone assembly

 #33
20170031648
2017-02-02

Terminal apparatus, audio system, and method for controlling sound volume of external speaker thereof

 #34
20160334623
2016-11-17

DISPLAY DEVICE, DISPLAY METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM STORING DISPLAY PROGRAM

 #35
20160313971
2016-10-27

Volume limit

 #36
20160274860
2016-09-22

Playback and light control based on proximity

 #37
20160255449
2016-09-01

Variable sound attenuator with hearing aid

 #38
20160254795
2016-09-01

Automated audio volume stabilizer

 #39
20160216935
2016-07-28

System and method for issuing commands in a media playback system

 #40
20160072466
2016-03-10

Information processing apparatus, control method, and non-transitory computer readable storage medium

 #41
20160070529
2016-03-10

Playback control based on proximity

 #42
20150293744
2015-10-15

Remote control apparatus, method and multimedia system for volume control

 #43
20150263685
2015-09-17

Information processing apparatus, storage medium having stored therein information processing program, information processing system, and information processing method

 #44
20150254053
2015-09-10

Using visual cues to improve appliance audio recognition

 #45
20150244337
2015-08-27

Method and apparatus for automatically controlling gain based on sensitivity of microphone in electronic device

 #46
20150091709
2015-04-02

System and method for issuing commands in a media playback system

 #47
20150086042
2015-03-26

Quantity adjusting apparatus

 #48
20140376748
2014-12-25

Audio signal processing system

 #49
20140270257
2014-09-18

Variable sound attenuator

 #50
20140240595
2014-08-28

Systems and methods for dynamically adjusting volume based on media content

 #51
20140211969
2014-07-31

Mobile terminal and controlling method thereof

 #52
20140161284
2014-06-12

Contactless volume control device with adjustable gain and multi-output

 #53
20140093092
2014-04-03

Volume control device and method thereof

 #54
20140010376
2014-01-09

Method and apparatus for antenna parameter notification

 #55
20140003629
2014-01-02

Modification of audio responsive to proximity detection

 #56
20130329911
2013-12-12

Apparatus and method for adjusting volume in terminal

 #57
20130329904
2013-12-12

Device, headphones and audio player with environmental sound mixing function

 #58
20130259265
2013-10-03

Audio signal output device and audio output system

 #59
20130148826
2013-06-13

Method and apparatus for processing audio in mobile terminal

 #60
20130044897
2013-02-21

Electronic device and audio adjustment method

 #61
20120039486
2012-02-16

WIRELESS SOUND AMPLIFICATION SYSTEM WITH MICROPHONE BASED VOLUME CONTROL

 #62
20120008801
2012-01-12

"POSSE" -- an acronym for "Personal OnStage Sound Enhancer"

 #63
20120001690
2012-01-05

System for driver amplifier

 #64
20110211712
2011-09-01

Volume control system, controller, and amplifying apparatus

 #65
20100177912
2010-07-15

System and Method for Providing Volume Control

 #66
20090208035
2009-08-20

Volume control apparatus and volume control program

 #67
20070206820
2007-09-06

Volume Control Method, Volume Controller, Volume Control Program, Electronic Apparatus

 #68
20060072769
2006-04-06

Audio output level setting method and device

 #69
20060050899
2006-03-09

System and method for controlling sound volume

 #70
20050238190
2005-10-27

Hearing aid