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Interconnection arrangements not involving centralised switching
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H04M9/00
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Parent Industries
H
ELECTRICITY
H04
Electric communication
H04M
TELEPHONIC COMMUNICATION
Current Industry
H04M9/00
Interconnection arrangements not involving centralised switching
Sub Industries
H04M9/001
Two-way communication systems between a limited number of parties
H04M9/002
with subscriber controlled access to a line
H04M9/003
Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set
H04M9/005
with subscriber controlled access to an exchange line
H04M9/006
Exchange line circuits
H04M9/007
wherein the key telephone sets are star-connected to a central unit by a limited number of lines
H04M9/008
Multiplex systems
H04M9/02
involving a common line for all parties
H04M9/022
Multiplex systems
H04M9/025
Time division multiplex systems
H04M9/027
Frequency division multiplex systems
H04M9/04
involving a separate line for each pair of parties
H04M9/06
involving combinations of interconnecting lines
H04M9/08
Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic
H04M9/082
using echo cancellers
H04M9/085
using digital techniques
H04M9/087
using different frequency bands for transmitting and receiving paths ; using phase shifting arrangements
H04M9/10
with switching of direction of transmission by voice frequency
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last 30 patents
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Patent Grant
Information processing apparatus, information processing method, an...
Patent number
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Issue date
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FUJIFILM Business Innovation Corp.
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method, system, and server for reducing noise in a workspace
Patent number
12,346,754
Issue date
Jul 1, 2025
RINGCENTRAL, INC.
Epameinondas Kontothanasis
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Method and system for acoustic communication of data
Patent number
12,341,931
Issue date
Jun 24, 2025
Sonos Experience Limited
Daniel John Jones
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Echo detection
Patent number
12,335,442
Issue date
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Google LLC
Alexandre Loiko
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Detecting and flagging acoustic problems in video conferencing
Patent number
12,323,560
Issue date
Jun 3, 2025
Google LLC
Christian Schüldt
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Post-mixing acoustic echo cancellation systems and methods
Patent number
12,309,326
Issue date
May 20, 2025
Shure Acquisition Holdings, Inc.
Sean Wells-Rutherford
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Echo cancellation
Patent number
12,301,769
Issue date
May 13, 2025
Cirrus Logic Inc.
Robert D. Rand
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multiple dwelling house interphone system
Patent number
12,294,671
Issue date
May 6, 2025
AIPHONE CO., LTD.
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Double talk detectors
Patent number
12,267,463
Issue date
Apr 1, 2025
Hewlett-Packard Development Company, L.P.
Srikanth Kuthuru
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Evaluation apparatus, evaluation method, and program
Patent number
12,267,453
Issue date
Apr 1, 2025
Nippon Telegraph and Telephone Corporation
Sachiko Kurihara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Methods for reducing error in environmental noise compensation systems
Patent number
12,243,548
Issue date
Mar 4, 2025
Dolby Laboratories Licensing Corporation
Benjamin Alexander Jancovich
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Multi-channel acoustic echo cancellation
Patent number
12,236,932
Issue date
Feb 25, 2025
SONOS, INC.
Saeed Bagheri Sereshki
G06 - COMPUTING CALCULATING COUNTING
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Patent Grant
Apparatus, methods and computer programs for performing acoustic ec...
Patent number
12,231,602
Issue date
Feb 18, 2025
Nokia Technologies Oy
Carl Nuzman
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Echo residual suppression
Patent number
12,231,603
Issue date
Feb 18, 2025
Dolby Laboratories Licensing Corporation
Ning Wang
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Blocking conference audio output
Patent number
12,225,161
Issue date
Feb 11, 2025
Hewlett-Packard Development Company, L.P.
He-Di Liu
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multiple dwelling house interphone system
Patent number
12,219,085
Issue date
Feb 4, 2025
AIPHONE CO., LTD.
Hirokazu Harima
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Robust short-time fourier transform acoustic echo cancellation duri...
Patent number
12,217,765
Issue date
Feb 4, 2025
SONOS, INC.
Daniele Giacobello
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
TDD time slot splitting
Patent number
12,212,718
Issue date
Jan 28, 2025
Telefonaktiebolaget LM Ericsson (publ)
David Astely
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Interface device for intercom access control systems
Patent number
12,206,826
Issue date
Jan 21, 2025
Amazon Technologies, Inc.
Aaron Lung
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Programmable signal generator and radio controller
Patent number
12,193,118
Issue date
Jan 7, 2025
Lennard A. Gumaer
G08 - SIGNALLING
Information
Patent Grant
Sound localization for an electronic call
Patent number
12,185,076
Issue date
Dec 31, 2024
Glen A. Norris
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Multiband limiter modes and noise compensation methods
Patent number
12,159,644
Issue date
Dec 3, 2024
Dolby Laboratories Licensing Corporation
Timothy Alan Port
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Multiband limiter modes and noise compensation methods
Patent number
12,154,587
Issue date
Nov 26, 2024
Dolby Laboratories Licensing Corporation
Timothy Alan Port
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Systems and methods for crosstalk reduction for audio communications
Patent number
12,143,541
Issue date
Nov 12, 2024
HM Electronics, Inc.
Daniel Gish
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Methods for reducing error in environmental noise compensation systems
Patent number
12,136,432
Issue date
Nov 5, 2024
Dolby Laboratories Licensing Corporation
Benjamin Alexander Jancovich
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Cloud byte stream alignment method
Patent number
12,114,023
Issue date
Oct 8, 2024
Harman International Industries, Incorporated
Cristian Chis
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Method and system for operating a bi-directional audio device with...
Patent number
12,095,952
Issue date
Sep 17, 2024
Logitech Europe S.A.
Vivek Sekar
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Speaker identification-based echo detection and solution
Patent number
12,069,113
Issue date
Aug 20, 2024
Hewlett-Packard Development Company, L.P.
Yibo Liu
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Multiple dwelling house interphone system
Patent number
12,052,384
Issue date
Jul 30, 2024
AIPHONE CO., LTD.
Yuta Shimomura
G07 - CHECKING-DEVICES
Information
Patent Grant
Conferencing device with beamforming and echo cancellation
Patent number
12,052,393
Issue date
Jul 30, 2024
ClearOne, Inc.
Ashutosh Pandey
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Patents Applications
last 30 patents
Information
Patent Application
ECHO CANCELLATION
Publication number
20250233944
Publication date
Jul 17, 2025
Cirrus Logic International Semiconductor Ltd.
Robert D. RAND
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION DEVICE, COMMUNICATION METHOD, AND NON-TRANSITORY COMP...
Publication number
20250193315
Publication date
Jun 12, 2025
Panasonic Intellectual Property Corporation of America
Hiroki FURUKAWA
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
SPATIALLY BASED ADAPTIVE FILTER FOR A DOUBLE TALK RECOVERY METHOD
Publication number
20250175558
Publication date
May 29, 2025
GM GLOBAL TECHNOLOGY OPERATIONS LLC
Amos Schreibman
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
METHOD, SYSTEM, AND SERVER FOR REDUCING NOISE IN A WORKSPACE
Publication number
20250165317
Publication date
May 22, 2025
RingCentral, Inc.
Epameinondas KONTOTHANASIS
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
ROBUST FOREGROUND/BACKGROUND FILTERING CONTROL FOR ACOUSTIC ECHO CA...
Publication number
20250159083
Publication date
May 15, 2025
Dolby Laboratories Licensing Corporation
Ning Wang
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DEVICE, SYSTEM AND METHOD FOR CANCELLING ECHO AT ELECTRONIC DEVICES
Publication number
20250150539
Publication date
May 8, 2025
Mitel Networks Corporation
Dieter SCHULZ
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
CONFERENCE TERMINAL AND ECHO CANCELLATION METHOD
Publication number
20250141998
Publication date
May 1, 2025
ZHEJIANG ALIBABA ROBOT CO., LTD.
Cheng XUE
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
METHOD AND DEVICE FOR CONTROLLING MICROPHONE INPUT SIGNAL IN VEHICLE
Publication number
20250131935
Publication date
Apr 24, 2025
Hyundai Motor Company
Hae Sung Kang
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
SYSTEM AND METHOD FOR AUDIO LIMITING IN CALL DOWNLINK ALGORITHM
Publication number
20250124941
Publication date
Apr 17, 2025
HARMAN INTERNATIONAL INDUSTRIES, INCORPORATED
Yuanru DUAN
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
Sound Localization for an Electronic Call
Publication number
20250126423
Publication date
Apr 17, 2025
Glen A. Norris
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
METHOD AND APPARATUS FOR IN-EAR CANAL SOUND SUPPRESSION
Publication number
20250119499
Publication date
Apr 10, 2025
ST R&DTech, LLC
Jason McIntosh
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
AUDIO DEVICE AND CONTROL METHOD THEREOF
Publication number
20250080658
Publication date
Mar 6, 2025
Merry Electronics(Shenzhen) Co., Ltd.
Hung-Yuan Li
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DISCONTINUOUS NOISE REMOVAL IN AN AUDIO PROCESSING PIPELINE
Publication number
20250037733
Publication date
Jan 30, 2025
Cisco Technology, Inc.
Chamran MoradiAshour
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
EXTERNAL NOISE-BASED MICROPHONE AND SENSOR CONTROL METHOD AND ELECT...
Publication number
20250016501
Publication date
Jan 9, 2025
Samsung Electronics Co., Ltd.
Seonmi KIM
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
BLOCKING CONFERENCE AUDIO OUTPUT
Publication number
20240422265
Publication date
Dec 19, 2024
Hewlett-Packard Development Company, L.P.
He-Di Liu
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
JOINT FAR-END AND NEAR-END SPEECH INTELLIGIBILITY ENHANCEMENT
Publication number
20240404543
Publication date
Dec 5, 2024
RTX A/S
Andreas Jonas FUGLSIG
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
VOICE SIGNAL PROCESSING DEVICE, VOICE SIGNAL PROCESSING METHOD, AND...
Publication number
20240386901
Publication date
Nov 21, 2024
Panasonic Intellectual Property Corporation of America
Yoshifumi HIROSE
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
TELEPHONE SIGNAL PROCESSING
Publication number
20240357040
Publication date
Oct 24, 2024
Sycurio Limited
Yufei Tao
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SYSTEMS AND METHODS FOR CROSSTALK REDUCTION FOR AUDIO COMMUNICATIONS
Publication number
20240314245
Publication date
Sep 19, 2024
HM Electronics, Inc.
Daniel Gish
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMMUNICATION SKILLS TRAINING FOR PRIVATE FEEDBACK IN MULTI-USER CO...
Publication number
20240264797
Publication date
Aug 8, 2024
Yoodli, Inc.
Esha Joshi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
ELECTRONIC DEVICE AND MICROPHONE SIGNAL CORRECTION METHOD THEREOF
Publication number
20240265931
Publication date
Aug 8, 2024
Samsung Electronics Co., Ltd.
Seungyoon HEO
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
COORDINATION OF AUDIO DEVICES
Publication number
20240267469
Publication date
Aug 8, 2024
Dobly Laboratories Licensing Corporation
Glenn N. DICKINS
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
HYBRID DIGITAL SIGNAL PROCESSING-ARTIFICIAL INTELLIGENCE ACOUSTIC E...
Publication number
20240251039
Publication date
Jul 25, 2024
Zoom Video Communications, Inc.
Jiachuan DENG
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
Multi-Channel Acoustic Echo Cancellation
Publication number
20240203390
Publication date
Jun 20, 2024
Sonos, Inc.
Saeed Bagheri Sereshki
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
MICROPHONE SELECTION IN MULTIPLE-MICROPHONE DEVICES
Publication number
20240195918
Publication date
Jun 13, 2024
DSP Concepts, Inc.
James Brian Piket
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
ECHO SUPPRESSING DEVICE, ECHO SUPPRESSING METHOD, AND ECHO SUPPRESS...
Publication number
20240171685
Publication date
May 23, 2024
TRANSTRON INC.
Yuki SATOMI
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
LEARNING METHOD FOR INTEGRATED NOISE ECHO CANCELLATION SYSTEM USING...
Publication number
20240129410
Publication date
Apr 18, 2024
Industry-University Cooperation Foundation Hanyang University
Joon Hyuk CHANG
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
Multi-Channel AEC System Identification for Self-Calibration
Publication number
20240121568
Publication date
Apr 11, 2024
Sonos, Inc.
Wenyu Jin
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Speaker Identification-Based Echo Detection and Solution
Publication number
20240121282
Publication date
Apr 11, 2024
Plantronics, Inc.
Yibo Liu
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
WIDEBAND DOUBLETALK DETECTION FOR OPTIMIZATION OF ACOUSTIC ECHO CAN...
Publication number
20240106933
Publication date
Mar 28, 2024
Shure Acquisition Holdings, Inc.
Wesley Lethem
H04 - ELECTRIC COMMUNICATION TECHNIQUE