H04M1/585 - CPC Classification Index

ClassID:

227447 ⎘

H04M1/585 - CPC Classification

Classification description:

Substation equipment, e.g. for use by subscribers; Anti-side-tone circuits implemented without inductive element

Recent Application in this class:

20230298555

2023-09-21

Voice Sensing using Multiple Microphones

20210065673

2021-03-04

Voice sensing using multiple microphones

20190304429

2019-10-03

Voice sensing using multiple microphones

20180047410

2018-02-15

Signal processor with side-tone noise reduction for a headset

20180047381

2018-02-15

Voice sensing using multiple microphones

20180012584

2018-01-11

Voice sensing using multiple microphones

20170289328

2017-10-05

Automatic Detection of Ear Tip Type

20170013356

2017-01-12

Voice signal extraction and input apparatus for smart device

20160267899

2016-09-15

Voice sensing using multiple microphones

#10

20150364145

2015-12-17

Self-voice feedback in communications headsets

#11

20150334215

2015-11-19

FAR-END SOUND QUALITY INDICATION FOR TELEPHONE DEVICES

#12

20150256660

2015-09-10

Frequency-dependent sidetone calibration

#13

20140288927

2014-09-25

Procedure and mechanism for controlling and using voice communication

#14

20100069114

2010-03-18

Sidetone adjustment based on headset or earphone type

#15

20100020940

2010-01-28

Far-end sound quality indication for telephone devices

#16

20090270039

2009-10-29

Method and hybrid circuit for attenuating near-end crosstalk in a bidirectional signal transmission

#17

20090110183

2009-04-30

Method, system, and apparatus for attenuating dual-tone multiple frequency confirmation tones in a telephone set

#18

20080298577

2008-12-04

METHOD AND SYSTEM FOR PROCESSING COMMUNICATION SIGNALS IN A COMMUNICATION SYSTEM