Patents
Sitemap › H04 - Electric communication technique › H04M - Telephonic communication › H04M 9 - Arrangements for interconnection not involving centralised switching
Patents for H04M 9 - Arrangements for interconnection not involving centralised switching (8,105)
06/2010
06/01/2010US7729372 Communicating in a network that includes a medium having varying transmission characteristics
05/2010
05/27/2010US20100128868 Acoustic echo canceler using an accelerometer
05/26/2010EP2189950A1 Access control system
05/26/2010EP2189949A1 Access control system
05/26/2010CN201491092U Four-wire video intercom doorbell
05/26/2010CN201491091U Digital interphone
05/26/2010CN1822092B Method and its device for elliminating background noise in speech input
05/26/2010CN1797546B Echo cancellation using adaptive iir and IIR and FIR filters
05/26/2010CN1797545B Echo cancellation using adaptive IIR and FIR filters
05/26/2010CN101040512B Echo cancellation device and method
05/25/2010US7725096 Multi-wideband communications over power lines
05/25/2010US7724895 Cordless telephone apparatus
05/25/2010US7724893 Method of adaptation step control in echo cancellers
05/25/2010US7724892 Method and apparatus for optimizing speakerphone performance based on tilt angle
05/25/2010US7724891 Method to reduce acoustic coupling in audio conferencing systems
05/19/2010EP2186312A1 Acoustic echo cancellation based on noise environment
05/19/2010CN201479218U Management machine of visitor door phone system
05/19/2010CN101218820B Relay apparatus and communication system
05/18/2010US7720234 Communications interface device
05/18/2010US7720232 Speakerphone
05/18/2010US7720218 Telephone with enhanced function display and selection ability
05/18/2010US7720217 Mute condition indicator
05/18/2010US7720216 Acoustic pass through for handsets
05/18/2010US7720201 Communication apparatus
05/13/2010US20100119055 Systems and methods for half-duplex speakerphones and other two-way communication devices
05/12/2010CN201467237U CAN bus-based voice communication device
05/12/2010CN201467236U Window walkie-talkie
05/12/2010CN201467235U Industrial digital intercom terminal
05/12/2010CN1809105B Dual-microphone speech enhancement method and system applicable to mini-type mobile communication devices
05/12/2010CN1503466B Echo eliminating method, circuit and system for sparse channels
05/12/2010CN101046965B Method for generating comfortable noise in echo removing
05/11/2010US7715817 Methods and systems for providing wireless communications through a utility pole mounted antenna
05/11/2010US7715816 Methods and systems for providing wireless network communications
05/11/2010US7715550 Telephone line interface, side-tone attenuation circuit and method
05/11/2010US7715387 Healthcare computer system with intra-room network
05/06/2010WO2010051509A1 Selectively switching between multiple microphones
05/06/2010WO2010050841A1 Adaptive filtering with flexible selection of algorithm complexity and performance
05/06/2010US20100115562 Audio system and main box
05/05/2010CN201450534U multifunctional integrated interphone
05/05/2010CN1754377B Method for detecting presence of service on telephone line
05/04/2010US7711112 Hinge, and opening/closing type portable terminal device having the same
05/04/2010US7711111 Assembling structure of back cover for mobile phone
05/04/2010US7711110 Universal speakerphone with adaptable interface
05/04/2010US7711109 System and method for subliminal time domain duplexing
05/04/2010US7711108 Fast echo canceller reconvergence after TDM slips and echo level changes
05/04/2010US7711107 Perceptual masking of residual echo
04/2010
04/29/2010US20100104091 Enhanced echo cancellation
04/29/2010US20100104090 Method and Arrangement for power Minimization in a Multi-Tone Transmission-Based Communication System
04/28/2010CN1842110B Echo eliminating device and method
04/27/2010US7706549 Broadside small array microphone beamforming apparatus
04/27/2010US7706527 Interruption device for a data communication line
04/27/2010US7706526 Method and apparatus for powering electronics associated with a telephone line twisted pair
04/27/2010US7706525 Systems and methods for side-tone noise suppression
04/27/2010US7706515 Programmable paging controller with programmable switch contact
04/27/2010US7706349 Methods and systems for selecting modulation in an orthogonal frequency division multiplexing system
04/27/2010CA2446085C Audio conference platform with dynamic speech detection threshold
04/21/2010CN201440681U Interphone with illuminating function
04/21/2010CN101001293B Method for removing echo in radio earphone communication
04/20/2010US7702122 Headgear for docking and listening to portable audio devices
04/20/2010US7702096 Self-cradling type portable terminal
04/15/2010WO2010042326A1 Compact beamforming microphone assembly
04/15/2010DE102008051511A1 Hands-free set for e.g. touchscreen products, for producing voice transmission in telephone or house intercom/communication, produces communication for house intercom or telephone in duplex operation
04/14/2010EP2175640A1 Recorder
04/14/2010EP2174236A2 A method and system for dynamic aliasing suppression.
04/14/2010CN201438718U Interphone with radio function
04/13/2010US7697679 Telephone set having a handset with an integrated pointing device
04/13/2010US7697674 Gate intercom with a wireless telephony interface
04/13/2010US7697453 Synchronization techniques in multipoint-to-point communication using orthogonal frequency division multiplexing
04/08/2010WO2010039437A1 Multiple microphone switching and configuration
04/08/2010US20100086123 Remote powered node
04/08/2010US20100086122 Echo canceller and echo cancelling method and program
04/07/2010CN101026659B Method for realizing echo time delay positioning
04/06/2010US7693523 Implementation of collaborative telecommunications services
04/06/2010US7693291 Multi-channel frequency-domain adaptive filter method and apparatus
04/06/2010US7693276 Method of measuring distortion and determining residue-echo threshold in loop start trunk circuits
04/01/2010WO2010035524A1 Intercom system
04/01/2010US20100080381 Method and Apparatus for Supplying DC Feed to a Subscriber Line
04/01/2010US20100080380 Method and Apparatus for Supplying DC Feed to a Subscriber Line
03/2010
03/31/2010CN101686415A Embedded wireless talkback doorbell
03/30/2010US7689175 Configurable frequency band elimination for powerline network
03/30/2010US7688971 Network telephone expansion seat
03/30/2010US7688969 Operation dial with rotary encoder
03/30/2010US7688968 Adaptive analog echo/next cancellation
03/25/2010WO2010032502A1 Intercom system
03/25/2010US20100074434 Echo cancelling device, communication device, and echo cancelling method having the error signal generating circuit
03/25/2010US20100074433 Multichannel Acoustic Echo Cancellation
03/25/2010US20100074432 Double-talk detection
03/23/2010US7685340 Method and system for programmable input/output transceiver wherein transceiver in configurable to support a plurality of interface standards
03/23/2010US7684837 Cellular phone and cellular phone manufacturing method
03/23/2010US7684836 Portable terminal device of the foldable type
03/23/2010US7684583 In-ear type and ear-plug type earphone with adjustable volume of front chamber between speaker and housing
03/23/2010US7684562 Telephone sanitizing glove
03/23/2010US7684560 Earset
03/23/2010US7684559 Acoustic echo suppressor for hands-free speech communication
03/23/2010US7684499 Multi-band line interface circuit with line side cancellation
03/17/2010CN101674383A Transmission method of analog signal of wired intercom
03/16/2010USRE41164 Impedance blocking filter circuit
03/16/2010US7680267 Headset with a retractable speaker portion
03/16/2010US7680266 System and method for adaptive reduced-rank parameter estimation using an adaptive decimation and interpolation scheme
03/16/2010US7680265 Echo canceler circuit and method
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