H03G9/02 - CPC Classification Index

ClassID:

220302 ⎘

H03G9/02 - CPC Classification

Classification description:

Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers

Sub-classes:

H03G9/025 » {frequency-dependent volume compression or expansion, e.g. multiple-band systems } 322
H03G9/04 » having discharge tubes 1
H03G9/12 » having semiconductor devices 14

Recent Application in this class:

20220212020

2022-07-07

Variable sound system for audio devices

20210219050

2021-07-15

Information processing device, information processing method, and program

20210085991

2021-03-25

Variable sound system for audio devices

20200009395

2020-01-09

Variable sound system for audio devices

20190255342

2019-08-22

Variable sound system for audio devices

20190123704

2019-04-25

Audio processor and audio processing method

20170274215

2017-09-28

Variable sound system for audio devices

20150264481

2015-09-17

Amplifier capable of controlling cut-off frequency in real time and amplification method for controlling cut-off frequency in real time

20150256140

2015-09-10

Variable sound system for medical devices

#10

20150256137

2015-09-10

Formant amplifier

#11

20140355786

2014-12-04

Sound synthesis with fixed partition size convolution of audio signals

#12

20110163803

2011-07-07

Programmable gain amplifier and embedded filter

#13

20110150242

2011-06-23

Adaptive loudness levelling for digital audio signals

#14

20080240210

2008-10-02

Gain insensitive high-pass VGA

#15

20070077904

2007-04-05

Gain insensitive high-pass VGA