H04R2231/00 - CPC Classification Index

ClassID:

232171 ⎘

H04R2231/00 - CPC Classification

Classification description:

Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by , not provided for in its subgroups

Sub-classes:

H04R2231/001 » Moulding aspects of diaphragm or surround 59
H04R2231/003 » Manufacturing aspects of the outer suspension of loudspeaker or microphone diaphragms or of their connecting aspects to said diaphragms 96

Recent Application in this class:

20210092501

2021-03-25

Speaker panel

20190052944

2019-02-14

Integrated temperature sensor in microphone package

20170374440

2017-12-28

Speaker panel

20170094436

2017-03-30

Capacitive microphone with integrated cavity

20170041716

2017-02-09

System and method for a multi-electrode MEMS device

20160165330

2016-06-09

Integrated temperature sensor in microphone package

20160142823

2016-05-19

Membrane and method for producing diaphragm, and composite diaphragm

20160112806

2016-04-21

Method of manufacturing a microphone

20160088402

2016-03-24

Capacitive micro-electro-mechanical system microphone and method for manufacturing the same

#10

20160014538

2016-01-14

Micromechanical digital loudspeaker

#11

20150245118

2015-08-27

Micromechanical digital loudspeaker

#12

20150172825

2015-06-18

Method and Apparatus for an Acoustic Device Having a Coating

#13

20150017320

2015-01-15

Method of manufacturing stacked thin film piezoelectric filter

#14

20140348349

2014-11-27

Speaker device

#15

20140226846

2014-08-14

Capacitive microphone with integrated cavity

#16

20120148071

2012-06-14

Micromechanical digital loudspeaker

#17

20110131774

2011-06-09

Method of manufacturing stacked thin film piezoelectric filter

#18

20100119088

2010-05-13

Capacitive microphone with integrated cavity