Patents-Review.com
ClassID:

201969 ⎘

H01G7/02 - CPC Classification

Classification description:

Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture Electrets, i.e. having a permanently-polarised dielectric

Sub-classes:
Recent Application in this class:
#1
20250075310
2025-03-06

METHOD FOR MANUFACTURING ELECTRET MATERIAL

 #2
20240274372
2024-08-15

ELECTROLYTIC DIRECT ENERGY CONVERTER (EDEC)

 #3
20230098623
2023-03-30

Vibrational Energy Harvester Element

 #4
20220324697
2022-10-13

Electrostatic device, electrostatic device intermediate body and production method

 #5
20210319959
2021-10-14

High energy density capacitor system and method

 #6
20210184599
2021-06-17

Electrostatic motor

 #7
20210119556
2021-04-22

Vibrational energy harvester element

 #8
20210012969
2021-01-14

Electrically conductive electret and associated electret-based power source and self-powered structure

 #9
20200098525
2020-03-26

Electret energy storage system

 #10
20200009489
2020-01-09

ELECTRET-TREATED SHEET AND FILTER

 #11
20190311702
2019-10-10

Piezoelectric element and musical instrument

 #12
20190253000
2019-08-15

Electrostatic motor

 #13
20190165695
2019-05-30

Semiconductor device

 #14
20190057816
2019-02-21

Electret sheet

 #15
20190044457
2019-02-07

ELECTRICAL POWER GENERATOR

 #16
20180294744
2018-10-11

ELECTRICAL POWER GENERATION DEVICE AND GENERATION METHOD

 #17
20180159446
2018-06-07

ELECTROSTATIC MICROGENERATOR AND METHOD FOR GENERATING ELECTRICAL ENERGY USING AN ELECTROSTATIC MICROGENERATOR

 #18
20180130610
2018-05-10

ENERGY STORAGE APPARATUS AND RELATED METHODS

 #19
20180102221
2018-04-12

System and method for electret surface potential restoration by a directional pulsating electric field

 #20
20180013057
2018-01-11

Element and electric generator

 #21
20170370352
2017-12-28

Vibration energy harvester

 #22
20170329427
2017-11-16

Electret element and manufacturing method therefor, sensor, electronic circuit, and input device

 #23
20170162415
2017-06-08

System and method for clamping a work piece

 #24
20170133077
2017-05-11

Electroentropic memory device

 #25
20170113170
2017-04-27

Electret

 #26
20160165356
2016-06-09

Condenser type electroacoustic transducer

 #27
20160102223
2016-04-14

Polymer electret and method of manufacturing the same

 #28
20160009552
2016-01-14

Micro/nano structures of colloidal nanoparticles attached to an electret substrate and method for producing such micro/nano structures

 #29
20150295163
2015-10-15

Piezoelectric stack

 #30
20150155104
2015-06-04

Energy storage apparatus

 #31
20150061458
2015-03-05

ELECTRET STRUCTURE AND METHOD FOR MANUFACTURING SAME, AND ELECTROSTATIC INDUCTION-TYPE CONVERSION ELEMENT

 #32
20150022028
2015-01-22

System and method for electret surface potential restoration by a directional pulsating electric field

 #33
20140240893
2014-08-28

Electrostrictive resonance suppression for tunable capacitors

 #34
20140065318
2014-03-06

Method for forming electret containing positive ions

 #35
20130201549
2013-08-08

Suspended particle device, light control device using the same, and driving method

 #36
20130057110
2013-03-07

Power generation device having a dielectric body and an electret

 #37
20130012091
2013-01-10

Electret materials

 #38
20120218733
2012-08-30

Electrostrictive resonance suppression for tunable capacitors

 #39
20120184170
2012-07-19

Electret Materials

 #40
20120169179
2012-07-05

Energy conversion device of electrostatic induction type

 #41
20110260699
2011-10-27

Silicon oxide electret electrode with laminate insulating film surrounding short conductive film

 #42
20110254384
2011-10-20

Method and apparatus for electric

 #43
20110230109
2011-09-22

Electret Materials

 #44
20110163615
2011-07-07

Patterned electret structures and methods for manufacturing patterned electret structures

 #45
20110012438
2011-01-20

Electret and electrostatic induction conversion device

 #46
20100328836
2010-12-30

Static eliminator, and microphone electretizing method and apparatus using static eliminator

 #47
20100263696
2010-10-21

Method and apparatus for electric treatment of substrates

 #48
20100238602
2010-09-23

Electrostrictive resonance suppression for tunable capacitors

 #49
20100002895
2010-01-07

CONDENSER MICROPHONE AND MEMS DEVICE

 #50
20090272269
2009-11-05

Method and apparatus for electric treatment of substrates

 #51
20090080682
2009-03-26

Electret condenser microphone

 #52
20090034760
2009-02-05

ELECTRONIC COMPONENT, FABRICATION METHOD FOR THE SAME AND ELECTRONIC DEVICE HAVING THE SAME

 #53
20080249269
2008-10-09

Electret materials

 #54
20080100148
2008-05-01

Electret device and electrostatic operating apparatus

 #55
20070189558
2007-08-16

Electret condenser microphone

 #56
20070025570
2007-02-01

Condenser microphone

 #57
20060254419
2006-11-16

Method and apparatus for electric treatment of substrates

 #58
20050276429
2005-12-15

Electret condenser microphone

 #59
20050163336
2005-07-28

Capacitor sensor