ClassID:

201768

H01F2038/143 - CPC Classification

Classification description:

Adaptations of transformers or inductances for specific applications or functions; Inductive couplings for signals

Recent Application in this class:
#1
20260094762
2026-04-02

MAGNETIC DATA INTERFACE

#2
20260058055
2026-02-26

System-On-Chip With A Plurality Of Chips Communicating Wirelessly Using Horizontal Inductive Coupling

#3
20260034925
2026-02-05

LIFT GATE WITH INDUCTIVE COUPLING PLATFORM

#4
20250378991
2025-12-11

CONFIGURABLE TRANSFORMER-BASED VOLTAGE MATCHING METHOD FOR AUDIO NOTIFICATION APPLIANCE CIRCUITS

#5
20250373076
2025-12-04

FILTER DEVICE

#6
20250336597
2025-10-30

COIL COMPONENT

#7
20250317320
2025-10-09

SENSING AND COMMUNICATIONS UNIT FOR OPTICALLY SWITCHABLE WINDOW SYSTEMS

#8
20250299876
2025-09-25

TABLET COMPUTER STAND AND COMBINED STAND DEVICE SYSTEM

#9
20250029781
2025-01-23

Causally-Aware Attribute Controlled Statement Generation in Language Models

#10
20250029780
2025-01-23

POSITION SENSING METHOD AND SYSTEM

#11
20250014799
2025-01-09

INSULATING CHIP AND SIGNAL TRANSMISSION DEVICE

#12
20240412918
2024-12-12

COIL STRUCTURE AND ELECTRONIC DEVICE

#13
20240347268
2024-10-17

MAGNETIC FIELD AUDIO LOOP FOR SWIMMING POOLS

#14
20240340041
2024-10-10

SYSTEM AND METHOD FOR CODED COMMUNICATION SIGNALS REGULATING INDUCTIVE POWER TRANSMISSIONS

#15
20240235268
2024-07-11

Far Field Magnetic Power Transfer

#16
20240221992
2024-07-04

TRANSFORMER CHIP AND SIGNAL TRANSMISSION DEVICE

#17
20240220036
2024-07-04

Electronic pen

#18
20240212915
2024-06-27

INDUCTANCE COIL PATH

#19
20240170205
2024-05-23

MICRO-TRANSFORMER FOR ISOLATORS

#20
20240118447
2024-04-11

Magnetic Field Antenna of a Metal Detector

#21
20240087802
2024-03-14

ISOLATOR

#22
20240039580
2024-02-01

MAGNETIC SIGNAL RECEIVING DEVICE AND MAGNETIC FIELD COMMUNICATION SYSTEM

#23
20240038444
2024-02-01

Multiple interface electronic card

#24
20230367404
2023-11-16

Electromagnetic pen with a front end having magnetic conductivity

#25
20230361628
2023-11-09

Electromagnetic connector for an industrial control system

#26
20230353416
2023-11-02

Sensing and communications unit for optically switchable window systems

#27
20230350505
2023-11-02

Electronic pen

#28
20230253148
2023-08-10

SIGNAL COUPLING DEVICE

#29
20230245819
2023-08-03

Connection system for exchanging electrical signals with magnetic symmetrical connectors

#30
20230238174
2023-07-27

Communication system and communication apparatus

#31
20230223188
2023-07-13

Magnetic field audio loop for swimming pools

#32
20230215622
2023-07-06

Tablet computer stand and combined stand keyboard system

#33
20230037631
2023-02-09

ELECTROMAGNETIC WAVE SHIELDING FILTER

#34
20220416844
2022-12-29

System and method for coded communication signals regulating inductive power transmissions

#35
20220415569
2022-12-29

System-on-chip with a plurality of chips communicating wirelessly using horizontal inductive coupling

#36
20220410786
2022-12-29

LIFT GATE WITH INDUCTIVE COUPLING PLATFORM

#37
20220367110
2022-11-17

Inductive transmission element with diagonal side walls

#38
20220351899
2022-11-03

Slide-on inductive coupler system

#39
20220270817
2022-08-25

Inductive coupler for downhole transmission line

#40
20220213737
2022-07-07

MCEI trough for inductive coupler

#41
20220190646
2022-06-16

Device and method enabling out-band communication in wireless charging device, method and system

#42
20220165491
2022-05-26

Compact Thin-Film Surface Mountable Coupler

#43
20220158337
2022-05-19

Signal transferring device and multiplexer using magnetic thin film structures

#44
20220157517
2022-05-19

INDUCTIVE COUPLER FOR DOWNHOLE TRANSMISSION LINE

#45
20220149660
2022-05-12

WIRELESS POWER SUPPLY UNIT AND POWER RECEPTION MODULE

#46
20220122768
2022-04-21

INDUCTIVE COUPLER FOR DOWNHOLE TRANSMISSION LINE

#47
20220037085
2022-02-03

MODULAR RECONFIGURABLE MAGNETIC NAVIGATION SYSTEM AND METHOD

#48
20220021414
2022-01-20

Electronic decoupling impedance

#49
20210398744
2021-12-23

Multiple interface electronic card

#50
20210391752
2021-12-16

Hardware and method for enhanced wireless receiver output power

#51
20210341311
2021-11-04

Sensor and sensor arrangement

#52
20210287851
2021-09-16

Tablet computer stand with near field coupling enhancement

#53
20210285291
2021-09-16

Wireless electrical feedthrough wetmate connector

#54
20210281113
2021-09-09

Coil module

#55
20210270763
2021-09-02

Monitoring device for a system for measuring process variables, in particular in liquid analysis

#56
20210265994
2021-08-26

Circuit arrangement with galvanic isolation

#57
20210217557
2021-07-15

Radio transmitter with transmit signal strength indicator and method thereof

#58
20210194543
2021-06-24

Wirelessly charged electronic device with shared inductor circuitry

#59
20210184511
2021-06-17

Electromagnetic connector for an Industrial Control System

#60
20210126339
2021-04-29

Sensing units including a radio-frequency sensor, and related systems, devices, and methods

#61
20210124022
2021-04-29

Sensor and method for manufacturing an inductive energy transmission unit

#62
20210046826
2021-02-18

Linear transport system, method for operating a linear transport system, and contactlessly transmitting power and data system

#63
20210012957
2021-01-14

Field device and remote station

#64
20210012945
2021-01-14

Inductance coil path

#65
20200350887
2020-11-05

Radio frequency processing apparatus and method

#66
20200303970
2020-09-24

System and method for coded communication signals regulating inductive power transmissions

#67
20200294714
2020-09-17

Device for the contactless transmission of data and of energy and for angle measurement

#68
20200271737
2020-08-27

System for determining shape of flexible display device

#69
20200168394
2020-05-28

Compact transceiver on a multi-level integrated circuit

#70
20200167012
2020-05-28

Structure of digital pen including antenna

#71
20200121936
2020-04-23

COIL ARRANGEMENT FOR A PROGRAMMING DEVICE AND PROGRAMMING DEVICE

#72
20200083746
2020-03-12

Inductive power transmitter

#73
20200076478
2020-03-05

Magnetic coupler and communication system

#74
20200075233
2020-03-05

Compact transceiver on a multi-level integrated circuit

#75
20200075225
2020-03-05

MAGNETIC COUPLER AND COMMUNICATION SYSTEM

#76
20200067561
2020-02-27

Inductor circuit and wireless communication devices

#77
20200044493
2020-02-06

Charging ports with integrated contactless communication units

#78
20200028536
2020-01-23

Inductor circuit and wireless communication devices

#79
20200014426
2020-01-09

ANTENNA DEVICE, ANTENNA COIL, AND ELECTRONIC APPARATUS

#80
20200013548
2020-01-09

Tablet computer stand with near field coupling enhancement

#81
20190356508
2019-11-21

Sensing and communications unit for optically switchable window systems

#82
20190356178
2019-11-21

Systems, methods and apparatuses for guidance and alignment in electric vehicles wireless inductive charging systems

#83
20190331937
2019-10-31

Multi-coil field generation in an electronic contact lens system

#84
20190284927
2019-09-19

Cased formation parameter data sampling employing an impedance matching directional coupling device

#85
20190277893
2019-09-12

Heat-resistance element for current detection

#86
20190260219
2019-08-22

Sensing coil system

#87
20190238188
2019-08-01

Male connector, female connector, and connection structure of male connector and female connector

#88
20190238109
2019-08-01

Optimal response reflectionless filter topologies

#89
20190229773
2019-07-25

Self-canceling magnetic structures for transferring power and communication signals

#90
20190206616
2019-07-04

Induction type power supply system and coil module thereof

#91
20190206614
2019-07-04

PHASE-SHIFTING SINUSOIDAL COMMUTATION WITH OPTIONAL ROTARY TRANSFORMER

#92
20190190322
2019-06-20

System and method for improved DC power line communication

#93
20190158149
2019-05-23

Wirelessly charged electronic device with shared inductor circuitry

#94
20190156994
2019-05-23

Multiple interface electronic card

#95
20190148989
2019-05-16

Power transmission communication unit

#96
20190089196
2019-03-21

Wireless device

#97
20190066915
2019-02-28

Near field communication for field devices

#98
20190048667
2019-02-14

Electrical power transmission for well construction apparatus

#99
20190043649
2019-02-07

Semiconductor device, semiconductor chip, and system

#100
20190026411
2019-01-24

Directed magnetic field coil design

#101
20180365681
2018-12-20

Magnetic secure transmission device and electronic device including the magnetic secure transmission device

#102
20180342908
2018-11-29

System and method for coded communication signals regulating inductive power transmissions

#103
20180331573
2018-11-15

Voltage and current compensation in an inductive power transfer unit

#104
20180309323
2018-10-25

Inductive power transfer unit, a system for inductive power transfer and a method of communicating

#105
20180261384
2018-09-13

Induction type power supply system and coil module thereof

#106
20180241436
2018-08-23

Stackable connector and device for wireless transmission of power

#107
20180240034
2018-08-23

Systems and methods for creating and using higher degree interactions between quantum devices

#108
20180233273
2018-08-16

WIRELESS POWER TRANSMITTING DEVICE

#109
20180233264
2018-08-16

Coupled coils with lower far field radiation and higher noise immunity

#110
20180219586
2018-08-02

Self-canceling magnetic structures for transferring power and communication signals

#111
20180204673
2018-07-19

Transformer and power supply board

#112
20180182526
2018-06-28

Coil module

#113
20180166930
2018-06-14

Electromagnetic connectors for an industrial control system

#114
20180107293
2018-04-19

Tip structure of stylus for determining axial direction and angle of inclination of the stylus

#115
20180104831
2018-04-19

Robot linear drive heat transfer

#116
20180104830
2018-04-19

Robot drive and wireless data coupling

#117
20180102213
2018-04-12

Rotary type magnetic coupling device

#118
20180096787
2018-04-05

Internal coil structure and method for operating the same in a wireless terminal

#119
20180081137
2018-03-22

Side plane

#120
20180069439
2018-03-08

Virtual magnetic transmission lines for communication and power transfer in conducting media

#121
20180069312
2018-03-08

Electronic device having loop antenna

#122
20180062605
2018-03-01

Radio frequency processing apparatus and method

#123
20180062454
2018-03-01

Mechanical connectors for contactless communication units

#124
20180062420
2018-03-01

Charging ports with integrated contactless communication units

#125
20170331523
2017-11-16

Wireless power transmission network and wireless power transmission method

#126
20170310118
2017-10-26

INDUCTIVE POSITION DETERMINATION

#127
20170294808
2017-10-12

Transmission-guard system and method for an inductive power supply

#128
20170294798
2017-10-12

Wireless power transfer method and wireless power transmitter

#129
20170287630
2017-10-05

Coil and method for increasing the degree of an electromagnetic coupling

#130
20170264343
2017-09-14

Self-canceling magnetic structures for transferring power and communication signals

#131
20170263376
2017-09-14

Antenna system for near-field magnetic induction wireless communications

#132
20170250469
2017-08-31

Antenna apparatuses and approaches therefor

#133
20170194092
2017-07-06

Device for the contact-free transfer of electrical energy into a moving system of a shifting device

#134
20170179765
2017-06-22

Contactless connector and contactless connector system

#135
20170178803
2017-06-22

Coil device and apparatus including the same

#136
20170154727
2017-06-01

Galvanic isolation system, apparatus and method

#137
20170141816
2017-05-18

Connection/disconnection method and apparatus

#138
20170126195
2017-05-04

Optimal response reflectionless filters

#139
20170117093
2017-04-27

Internal coil structure and method for operating the same in a wireless terminal

#140
20170117087
2017-04-27

Inductance coil path

#141
20170093230
2017-03-30

System and method for improved DC power line communication

#142
20170074327
2017-03-16

Sensor arrangement and rolling bearing having such a sensor arrangement

#143
20170053738
2017-02-23

Circuit device

#144
20170036358
2017-02-09

Robot linear drive heat transfer

#145
20170025884
2017-01-26

System and method for providing wireless power transfer functionality to an electrical device

#146
20170010308
2017-01-12

Low loss acoustic wave sensors and tags and high efficiency antennas and methods for remote activation thereof

#147
20170005534
2017-01-05

Electromagnetic connector for an industrial control system

#148
20170005523
2017-01-05

Systems, methods and apparatus for guidance and alignment between electric vehicles and wireless charging systems

#149
20170004921
2017-01-05

Coil device and apparatus including the same

#150
20160380604
2016-12-29

TRANSFORMER BASED DUPLEXER

#151
20160380488
2016-12-29

Systems, methods and apparatuses for guidance and alignment in electric vehicles wireless inductive charging systems

#152
20160380487
2016-12-29

Systems, methods and apparatuses for guidance and alignment in electric vehicles wireless inductive charging systems

#153
20160379752
2016-12-29

Variable inductor and wireless communication device including variable device for conversion of a baseband signal to a radio frequency (RF) range

#154
20160373159
2016-12-22

Semiconductor device including spiral shape inductor and horseshoe shape inductor

#155
20160365185
2016-12-15

Controlling of a magnetic connection between an electrical device and a cable

#156
20160352301
2016-12-01

Local area network filtering circuit

#157
20160315480
2016-10-27

Wireless power transfer using a microwave signal

#158
20160293302
2016-10-06

Ferrite composition and electronic component

#159
20160276871
2016-09-22

Apparatus for transmitting data and energy between two objects moving relative to one another

#160
20160268041
2016-09-15

Slide-on inductive coupler system

#161
20160266843
2016-09-15

MEMORY DEVICE, COMMUNICATION DEVICE, AND MEMORY CONTROLLER

#162
20160254843
2016-09-01

Wirelessly charged electronic device with shared inductor circuitry

#163
20160240308
2016-08-18

Tablet computer stand with near field coupling enhancement

#164
20160211889
2016-07-21

Stackable, magnetically-retained connector interface

#165
20160204657
2016-07-14

Wireless power receiver and host control interface thereof

#166
20160203472
2016-07-14

Transmitter and method for substantially reducing dead zones in an inductive contactless mobile payment system

#167
20160181012
2016-06-23

Coupling device and coupling assembly for the contact-free transmission of data signals and method for the transmission of data signals

#168
20160155565
2016-06-02

Signal transfer device

#169
20160111202
2016-04-21

Transformer circuit and manufacturing method thereof

#170
20160064263
2016-03-03

Robot with linear drives and rotary drive

#171
20150372501
2015-12-24

Method and apparatus for power transfer through high permeability materials

#172
20150326032
2015-11-12

Transmission-guard system and method for an inductive power supply

#173
20150325919
2015-11-12

Device for the two-way inductive coupling of data signals to a power line

#174
20150318932
2015-11-05

Apparatus and method for wireless body communication

#175
20150318600
2015-11-05

Radio Frequency Power Combiner

#176
20150310987
2015-10-29

Circuit arrangement

#177
20150263870
2015-09-17

Ethernet network system and method for cancelling common mode signal

#178
20150248966
2015-09-03

Signal transmitting circuit

#179
20150244182
2015-08-27

Embedded interface for wireless power transfer to electrical devices

#180
20150228403
2015-08-13

Contactless power and data transfer

#181
20150195013
2015-07-09

Wireless power receiver and host control interface thereof

#182
20150188608
2015-07-02

Male connector, female connector, and connection structure of male connector and female connector

#183
20150178615
2015-06-25

OFFSETTING SHIELDING AND ENHANCING COUPLING IN METALLIZED SMART CARDS

#184
20150171931
2015-06-18

Wireless power transmission network and wireless power transmission method

#185
20150093986
2015-04-02

Communication and control regarding wireless electric vehicle electrical energy transfer

#186
20150069852
2015-03-12

Transmission of signals through a non-contact interface

#187
20150065039
2015-03-05

Communication device and communication system

#188
20150032386
2015-01-29

Distributor module and measuring system formed therewith

#189
20150006343
2015-01-01

Power supply device, power receiving device and billing method

#190
20140346890
2014-11-27

Feed unit and feed system for non-contact power transmission

#191
20140333149
2014-11-13

Circuit device

#192
20140323040
2014-10-30

Apparatus for power transmission and for inductive communication

#193
20140302782
2014-10-09

System and method for providing wireless power transfer functionality to an electrical device

#194
20140292098
2014-10-02

System and method for coded communication signals regulating inductive power transmission

#195
20140252872
2014-09-11

System and method for enabling ongoing inductive power transmission

#196
20140252871
2014-09-11

System and method for providing simple feedback signals indicating if more or less power is required during inductive power transmission

#197
20140241555
2014-08-28

Wirelessly charged electronic device with shared inductor circuitry

#198
20140239737
2014-08-28

Electronic control device for controlling actuators

#199
20140197783
2014-07-17

Apparatus and method for transmitting power and transceiving data using mutual resonance, and apparatus and method for receiving power and transceiving data using mutual resonance

#200
20140175876
2014-06-26

Ad hoc wireless sensor package

#201
20140145675
2014-05-29

Semiconductor integrated circuit and operation method of the same

#202
20140125147
2014-05-08

Transmission-guard system and method for an inductive power supply

#203
20140125146
2014-05-08

Transmission-guard system and method for an inductive power supply

#204
20140098929
2014-04-10

Non-contact rotary power transfer system

#205
20140041945
2014-02-13

Electromagnetic coupler

#206
20130334890
2013-12-19

Contactless interconnect

#207
20130231896
2013-09-05

Cable circuit with digital signal conditioning

#208
20130094680
2013-04-18

Portable Electronic Device with Magnetic Audio Interface and Audio Reproduction Accessory Therefor

#209
20130093387
2013-04-18

Inductive charging device for a portable apparatus incorporating a near-field communication antenna

#210
20130071218
2013-03-21

Low variability robot

#211
20130033256
2013-02-07

Sensor and sensor element

#212
20130002040
2013-01-03

Signal transmitting apparatus

#213
20120326526
2012-12-27

Inductively coupled data and power transfer system and apparatus

#214
20120228958
2012-09-13

Apparatus, system, and method for multicoil telemetry

#215
20120212073
2012-08-23

Non resonant inductive power transmission system and method

#216
20120196533
2012-08-02

Communication through a barrier

#217
20120193993
2012-08-02

Energy efficient inductive power transmission system and method

#218
20120075050
2012-03-29

Circuit device

#219
20120007442
2012-01-12

Rotary data and power transfer system

#220
20110316349
2011-12-29

Electrical power transmission system and electrical power output device

#221
20110291511
2011-12-01

Axial flux motor and generator assemblies

#222
20110210696
2011-09-01

Non-contact type power receiving apparatus, electronic equipment and charging system using the power receiving apparatus

#223
20110208440
2011-08-25

DISTRIBUTOR MODULE AND MEASURING SYSTEM FORMED THEREWITH

#224
20110175642
2011-07-21

Signal isolators using micro-transformers

#225
20110115597
2011-05-19

Transformer devices

#226
20110062793
2011-03-17

Transmission-guard system and method for an inductive power supply

#227
20100285747
2010-11-11

Hybrid transmitter for non-contact energy and data transmission

#228
20100216343
2010-08-26

Cable circuit with digital signal conditioning

#229
20100156193
2010-06-24

Inductively coupled data and power transfer system and apparatus

#230
20100134139
2010-06-03

Signal isolators using micro-transformers

#231
20100133916
2010-06-03

POWER TRANSFER APPARATUS AND METHOD FOR TRANSFERRING ELECTRIC POWER

#232
20100123540
2010-05-20

Contactless connector for use in a gas turbine

#233
20100102915
2010-04-29

Electrical connector system

#234
20100068998
2010-03-18

Wireless interface

#235
20100066475
2010-03-18

Housing for inductive coupler for power line communications

#236
20100066340
2010-03-18

Non-contact rotary power transfer system

#237
20100066176
2010-03-18

Non resonant inductive power transmission system and method

#238
20100052941
2010-03-04

Electrical transmission between rotating and non-rotating members

#239
20100033022
2010-02-11

SIGNAL COUPLER

#240
20100013321
2010-01-21

Power receiving control device, power receiving device, and electronic apparatus

#241
20100013320
2010-01-21

Power transmission control device, power transmission device, power receiving control device, power receiving device, and electronic apparatus

#242
20100013319
2010-01-21

Power transmission control device, power transmission device, power receiving control device, power receiving device, and electronic apparatus

#243
20090284341
2009-11-19

Coil unit and electronic apparatus using the same

#244
20090280743
2009-11-12

DEVICE FOR THE WIRELESS TRANSMISSION OF SIGNALS BETWEEN TWO PARTS OF A PROCESSING MACHINE

#245
20090278645
2009-11-12

Inductive coupler for power line communications, having a member for maintaining an electrical connection

#246
20090276199
2009-11-05

Inductive systems for non-contact transmission of electrical energy

#247
20090244866
2009-10-01

Circuit device

#248
20090243783
2009-10-01

Methods of making coil transducers

#249
20090189459
2009-07-30

Contactless energy and data transmission device and method

#250
20090185658
2009-07-23

Contactless power and data transmission apparatus

#251
20090156119
2009-06-18

Communication through a barrier

#252
20090140692
2009-06-04

Mobile terminal having recharge menu setting function and inter-recharging method using the same

#253
20090102590
2009-04-23

Underwater Electrically Insulated Connection

#254
20090085408
2009-04-02

Apparatus and method for wireless energy and/or data transmission between a source device and at least one target device

#255
20090051477
2009-02-26

Method of fabricating a transformer device

#256
20090014892
2009-01-15

Integrated circuit device

#257
20080311962
2008-12-18

Wireless terminals with integrated high speed serial communication hinges

#258
20080303351
2008-12-11

Coupling system

#259
20080252336
2008-10-16

Non-Contacting Interrogation of System States

#260
20080224543
2008-09-18

Non-contact signal transmission apparatus

#261
20080203824
2008-08-28

Information processing system and supply device

#262
20080191028
2008-08-14

Noncontact data receiver/transmiter

#263
20080180279
2008-07-31

Rotational transmitter

#264
20080169834
2008-07-17

Signal isolators using micro-transformers

#265
20080074226
2008-03-27

Element for use in an inductive coupler for downhole components

#266
20080001696
2008-01-03

Inductive power transfer system for underwater applications

#267
20070289772
2007-12-20

Electronic circuit

#268
20070264880
2007-11-15

CONNECTOR FOR THE TRANSMISSION OF SIGNALS, IN PARTICULAR FOR THE CONTACTLESS INDUCTIVE TRANSMISSION OF MEASUREMENT SIGNALS

#269
20070250981
2007-11-01

Inductive interface for an article of clothing and use of the interface

#270
20070183315
2007-08-09

Connection system, in particular a plug-in connection system for the transmission of data and power supply signals

#271
20070132247
2007-06-14

Electric power generation system

#272
20070080770
2007-04-12

Rotary transformer for transmission of electrical energy or information

#273
20070075818
2007-04-05

Inductive coupler

#274
20070035883
2007-02-15

Methods and apparatus for communicating signals between portions of an apparatus in relative movement to one another

#275
20060265142
2006-11-23

Connector including an integrated circuit powered by a connection to a conductor terminating in the connector

#276
20060261920
2006-11-23

Inductive coupler for power line communications

#277
20060250155
2006-11-09

Signal isolators using micro-transformers

#278
20060209487
2006-09-21

Transmitter head and system for contactless energy transmission

#279
20060199146
2006-09-07

Method of transferring power and data via an inductive link

#280
20060073722
2006-04-06

Telescopic data coupler

#281
20060008204
2006-01-12

Highly insulated inductive data couplers

#282
20060007350
2006-01-12

Rotatable wireless electrical coupler

#283
20050285705
2005-12-29

Element of an inductive coupler

#284
20050204992
2005-09-22

Remote operated vehicles

#285
20050162251
2005-07-28

Logging tool induction coil form

#286
20050145406
2005-07-07

Data transmission system for a downhole component

#287
20050070144
2005-03-31

Internal coaxial cable seal system

#288
20050057277
2005-03-17

Signal isolators using micro-transformers

#289
20050020233
2005-01-27

Repeaters sharing a common medium for communications

#290
17530115
2023-02-28

Magnetic field audio loop for swimming pools