| Patents for H04M 9 - Arrangements for interconnection not involving centralised switching (8,105) |
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| 04/08/2009 | EP2044762A1 Echo cancellation and noise reduction adaptation during ringing signal playback |
| 04/08/2009 | EP1623560A4 Torque cell |
| 04/08/2009 | CN100477705C Audio enhancement system, system equipped with the system and distortion signal enhancement method |
| 04/08/2009 | CN100477704C Method and device for acoustic echo cancellation combined with adaptive wavebeam |
| 04/07/2009 | US7515898 Connect customized ring back tone service only at one MSC when intersystem page is involved |
| 04/07/2009 | US7515709 Modular apparatus holder with multipurpose intermediate support member for supporting minicomputers, cell phones and similar apparatus |
| 04/07/2009 | US7515708 Privacy case for telephones |
| 04/07/2009 | US7515707 Portable apparatus having two rotatable and foldable units and hinge device used for the same |
| 04/07/2009 | US7515706 Headset with retractable cord for portable devices with automatic switching capability |
| 04/07/2009 | US7515705 Folding type portable terminal |
| 04/07/2009 | US7515704 Method, apparatus and articles incorporating a step size control technique for echo signal cancellation |
| 04/07/2009 | US7515703 Method and system for determining conference call embellishment tones and transmission of same |
| 04/01/2009 | CN201215976Y Echo eliminator having function of mobile phone |
| 04/01/2009 | CN101401398A Enhanced tone detector including adaptive multi-bandpass filter for tone detection and enhancement |
| 04/01/2009 | CN101399889A Method and device for mute processing to audible device |
| 03/31/2009 | US7512229 Key unit, method for marking key top, and method for manufacturing key unit using the same |
| 03/31/2009 | US7512228 System and method for operating a telephone to bypass a wireline telephone service |
| 03/31/2009 | US7512227 Echo canceller controller |
| 03/31/2009 | US7511515 System for providing power over communication cable having mechanism for determining resistance of communication cable |
| 03/26/2009 | US20090080644 Signal processing |
| 03/26/2009 | US20090080642 Enterprise-Distributed Noise Management |
| 03/26/2009 | US20090080554 Tone allocation in multipoint-to-point communication using orthogonal frequency division multiplexing |
| 03/26/2009 | US20090080553 Synchronization techniques in multipoint-to-point communication using orthogonal frequency division multiplexing |
| 03/26/2009 | US20090080552 System for multiple use subchannels |
| 03/26/2009 | US20090080505 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system |
| 03/26/2009 | DE202008013765U1 Türklingel und Türspion mit Kamera und Kommunikationsverbindung auf Funktelefon mit Videoübertragung Doorbell and peephole camera and communications link on cellular phone with video transmission |
| 03/25/2009 | EP1949370A4 A system and method for providing environmental specific noise reduction algorithms |
| 03/25/2009 | CN100473227C Method for filtering backward frame in mobile communication system |
| 03/24/2009 | US7509114 Redundant powered device circuit |
| 03/24/2009 | US7508933 Resonance chamber of a cellular phone |
| 03/24/2009 | US7508932 Cell phone holder headband |
| 03/24/2009 | US7508931 Method for detecting echo path changes in echo cancellers |
| 03/24/2009 | US7508930 Technique for independent ground fault detection of multiple twisted pair telephone lines connected to a common electrical power source |
| 03/24/2009 | US7508929 Apparatus and method of simulating telephone “in use” signals in a line in a telephone ring system |
| 03/19/2009 | US20090074177 Echo canceler and echo canceling program |
| 03/19/2009 | US20090074095 System for multi-frame alignment |
| 03/19/2009 | US20090074087 System for follow-up synchronization to maintain synchronization throughout transmission |
| 03/19/2009 | DE102007043973A1 Türbeschlag Door fittings |
| 03/18/2009 | EP1714398B1 Echo canceller with interference-level controlled step size |
| 03/17/2009 | US7505602 Mobile device with improved acoustic porting |
| 03/17/2009 | US7505582 Hinge mechanism having multiple axes of rotation for positioning of a mobile communication device |
| 03/17/2009 | US7505581 Folder type mobile terminal |
| 03/12/2009 | US20090067616 CAN echo cancellation level shifter |
| 03/12/2009 | US20090067615 Echo cancellation using gain control |
| 03/12/2009 | US20090067614 Common mode transmission line termination |
| 03/12/2009 | US20090067516 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system |
| 03/12/2009 | US20090067319 Systems and method for orthogonal frequency divisional multiplexing |
| 03/11/2009 | CN100469088C Video doorphone |
| 03/10/2009 | US7502462 Keyboard for a mobile device |
| 03/10/2009 | US7502461 Echo cancellation in a communication network |
| 03/05/2009 | WO2009029605A1 Acoustic echo cancellation based on noise environment |
| 03/05/2009 | WO2009029076A1 Controlling echo in the coded domain |
| 03/05/2009 | US20090060170 Method and apparatus for call control using motion and position information |
| 03/05/2009 | US20090060167 Adaptive filter for use in echo reduction |
| 03/03/2009 | US7499540 Device having pivotable hinges |
| 03/03/2009 | US7499539 Telephone line power supply |
| 02/26/2009 | WO2008123876A3 Broadband data and voice communications over wireless and powerline hybrid networks |
| 02/26/2009 | WO2008120436A3 Voice conference apparatus providing microphone directivity to reduce acoustic coupling |
| 02/24/2009 | US7496638 Launching a web site using a portable scanner |
| 02/24/2009 | US7496387 Wireless headset for use in speech recognition environment |
| 02/24/2009 | US7496195 Waterproof flip phone case |
| 02/24/2009 | US7496194 Sliding and swing apparatus for a portable apparatus |
| 02/19/2009 | WO2009023616A1 Acoustic echo canceller using multi-band nonlinear processing |
| 02/19/2009 | WO2009022502A1 Data communication system and data communication method |
| 02/19/2009 | US20090046847 Acoustic echo canceller using multi-band nonlinear processing |
| 02/19/2009 | DE112007000974T5 Verfahren und Systeme zum Verringern akustischer Echos bei Kommunikationssystemen Methods and systems for reducing acoustic echoes in communications systems |
| 02/18/2009 | CN100463551C System and method for realizing encrypted communication in mobile communication system |
| 02/17/2009 | US7493100 Compensating for dynamic nulls in a power line communication system |
| 02/17/2009 | US7492893 Rotation open and close type mobile terminal |
| 02/17/2009 | US7492892 Slide opening/closing type mobile device |
| 02/17/2009 | US7492890 Integrated corded system connector for a wireless communications device |
| 02/17/2009 | US7492889 Noise suppression based on bark band wiener filtering and modified doblinger noise estimate |
| 02/17/2009 | US7492791 Ranging and round trip delay timing adjustment in a multi-point to point bidirectional communication system |
| 02/17/2009 | US7490777 Low-power hand-held transaction device |
| 02/12/2009 | WO2009019867A1 Recorder |
| 02/12/2009 | US20090041228 Remote battery replacement notification system and method |
| 02/12/2009 | US20090041004 Inline power system and method for network communications |
| 02/11/2009 | CN101366265A Acoustic echo canceller |
| 02/11/2009 | CN101366264A Communications systems and methods using wireline adapters |
| 02/10/2009 | US7489956 Foldable mobile telephone with movable hinge |
| 02/10/2009 | US7489778 Mobile communication terminal with rotary camera |
| 02/10/2009 | US7489624 Scanning by remotes in multipoint-to-point communication using orthogonal frequency division multiplexing |
| 02/10/2009 | US7489623 Control modulation in multipoint-to-point communication using orthogonal frequency division multiplexing |
| 02/05/2009 | US20090036170 Voice activity detector and method |
| 02/05/2009 | US20090034712 Echo cancellation in which sound source signals are spatially distributed to all speaker devices |
| 02/05/2009 | US20090034692 Wireless plain ordinary telephone service (wireless pots) |
| 02/04/2009 | CN101360155A Active noise silencing control system |
| 02/04/2009 | CN100459511C Internal communication collecting cut-off connection information terminal system |
| 02/03/2009 | US7486972 Hands-free telephone apparatus |
| 02/03/2009 | US7486788 Transceiver with integrated hybrid circuit |
| 02/03/2009 | US7486787 Subscriber line interface circuitry with common base audio isolation stage |
| 01/29/2009 | US20090028354 Echo Canceller Employing Dual-H Architecture Having Split Adaptive Gain Settings |
| 01/29/2009 | US20090028321 Echo Path Change Detection in a Network Echo Canceller |
| 01/28/2009 | EP2019544A2 Noise suppression system, sound acquisition apparatus, sound output apparatus and computer-readable medium |
| 01/28/2009 | EP2019543A1 Echo canceller employing dual-H architecture having split adaptive gain settings |
| 01/27/2009 | US7483688 Network device with hybrid-mode transmitter |
| 01/27/2009 | US7483531 Telephone bill reducer |
| 01/27/2009 | US7483530 Apparatus for separating blind source signals having systolic array structure |
| 01/22/2009 | US20090022075 Selectively adaptable far-end echo cancellation in a packet voice system |
| 01/22/2009 | US20090022074 Echo canceller with interference-level controlled step size |