H04R2420/00 - CPC Classification Index

ClassID:

232194 ⎘

H04R2420/00 - CPC Classification

Classification description:

Details of connection covered by , not provided for in its groups

Sub-classes:

H04R2420/01 » Input selection or mixing for amplifiers or loudspeakers 529
H04R2420/03 » Connection circuits to selectively connect loudspeakers or headphones to amplifiers 400
H04R2420/05 » Detection of connection of loudspeakers or headphones to amplifiers 507
H04R2420/07 » Applications of wireless loudspeakers or wireless microphones 4,9K
H04R2420/09 » Applications of special connectors, e.g. USB, XLR, in loudspeakers, microphones or headphones 701

Recent Application in this class:

20250168611

2025-05-22

BLUETOOTH DATA FORWARDING

20240406648

2024-12-05

Privacy Device For Smart Speakers

20240048951

2024-02-08

Bluetooth data forwarding

20220286780

2022-09-08

Privacy device for smart speakers

20220210557

2022-06-30

System and method for improved content casting audio management

20220109935

2022-04-07

Microphone

20220078556

2022-03-10

Privacy device for mobile devices

20210211807

2021-07-08

Microphone

20210092509

2021-03-25

Sound transducer unit for generating and/or detecting sound waves in the audible wavelength spectrum and/or in the ultrasonic range

#10

20210029525

2021-01-28

Bluetooth data forwarding

#11

20200315323

2020-10-08

Makeup table

#12

20190326951

2019-10-24

Audio media streaming device

#13

20190174227

2019-06-06

Signal processing system and signal processing meihod

#14

20180359557

2018-12-13

Multi-function control of one or several multimedia playback devices

#15

20180080813

2018-03-22

Object information acquiring apparatus

#16

20170070262

2017-03-09

Audio media streaming device

#17

20160255450

2016-09-01

Microphone connecting device

#18

20160249147

2016-08-25

Mating assurance system and method

#19

20160164234

2016-06-09

Earphone socket, earphone plug, earphone and electronic device

#20

20150312677

2015-10-29

Active acoustic filter with location-based filter characteristics

#21

20150310024

2015-10-29

Acoustic playback system

#22

20150268091

2015-09-24

Object information acquiring apparatus

#23

20150208186

2015-07-23

Intelligent sound field control system

#24

20150016624

2015-01-15

Audio interface adapter device and audio signal receiving apparatus

#25

20140270229

2014-09-18

Method and system for power delivery to a headset

#26

20140037104

2014-02-06

Display apparatus, display system, and control method thereof

#27

20110160883

2011-06-30

Acoustic playback system