| Patents for H04M 19 - Current supply arrangements for telephone systems (7,475) |
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| 05/27/2004 | WO2004045194A1 Silent ringing with reduced device sizes |
| 05/27/2004 | US20040102163 Wireless telephone and wireless telephone system |
| 05/27/2004 | US20040101129 Device and method for playing a ring signal based on a mediate ring information in a communication apparatus |
| 05/27/2004 | DE19723968B4 Verfahren zur Aufladung und Aufladegerät zum Aufladen einer Ni-MH-oder Ni-Cd-Batterie eines Funktelefons Method for charging and charger for charging a Ni-MH or Ni-Cd battery of a radio telephone |
| 05/26/2004 | EP1421800A1 Method and device for single conductor local transmission of pcm signals without transformers |
| 05/26/2004 | CN1500342A Cradle, security system, telephone, and monitoring method |
| 05/26/2004 | CN1499806A Method and system for storaging and reproducing bell music of mobile telephone |
| 05/25/2004 | US6741702 Device for connecting a subscriber line to a high frequency link and to a low frequency link |
| 05/20/2004 | US20040097261 Portable terminal and announcement method |
| 05/20/2004 | US20040097218 Intelligent cellular telephone function |
| 05/19/2004 | EP1419642A1 A system and method for customising call alerts |
| 05/19/2004 | CN1498021A Portable terminal equipment |
| 05/19/2004 | CN1498007A Method of voice compressing in mobile terminal |
| 05/19/2004 | CN1497416A Portable information termainal |
| 05/19/2004 | CN1150787C Protable telephone |
| 05/19/2004 | CN1150745C Telephone exchanger |
| 05/13/2004 | WO2004040920A1 Calling party ringtone selection in telephone system |
| 05/13/2004 | US20040092295 Method for storing and reproducing ring tone melodies of mobile phones and system thereof |
| 05/13/2004 | US20040091267 Portable terminal device |
| 05/13/2004 | US20040091100 Loop current monitor circuitry and method for a communication system |
| 05/13/2004 | US20040091097 DC/DC converter and subscriber line interface circuit |
| 05/12/2004 | EP1418739A1 Direct digital access arrangement circuitry and method for connecting to phone lines |
| 05/12/2004 | EP0791264B1 Supply voltage switching apparatus |
| 05/12/2004 | EP0752182B1 Method and cable access unit suitable for saving or conserving power in a cable network |
| 05/11/2004 | US6735305 Detection of low tip/ring currents in a line powered DAA |
| 05/11/2004 | US6735302 DSP based SLIC architecture with current-sensing voltage synthesis impedance matching and DC feed control |
| 05/11/2004 | US6732787 Cabinet upgrade system for in-service telecommunications cabinets |
| 05/06/2004 | WO2004039045A1 Accessory fastening device for mobile unit and adapted accessory |
| 05/06/2004 | US20040087318 Apparatus and method for automatically muting restricted electronic devices in restricted areas |
| 05/06/2004 | US20040086105 Nighttime automatic illuminating device for telephone |
| 05/06/2004 | EP1416707A2 Method for storage and reproducing ring tone melodies |
| 05/06/2004 | EP1415488A1 Method for the transmission of data |
| 05/05/2004 | CN1494254A Remote network two stage power supply device |
| 05/04/2004 | US6731751 Apparatus for cordless computer telephony |
| 05/04/2004 | US6731738 Call tones in communication networks |
| 05/04/2004 | US6731728 Low noise line powered DAA with differential feedback |
| 04/29/2004 | WO2003030563A3 Front access dsx assembly |
| 04/29/2004 | US20040081316 Power feeding system for telephone terminal in lan |
| 04/29/2004 | US20040081305 Calling party ringtone selection in telephone system |
| 04/28/2004 | EP1414226A1 Mobile wireless communication handset with sound mixer and methods therefor |
| 04/28/2004 | EP1414222A2 Portable terminal device |
| 04/28/2004 | CN2613959Y Two-four line conversion and electric supply device for user interface circuit |
| 04/28/2004 | CN2613940Y Power source module for user's circuit of U interface of ISDN |
| 04/28/2004 | CN1492710A Mobile image processing device and method for portable terminal machine of image communication |
| 04/28/2004 | CN1492660A Remote detector |
| 04/28/2004 | CN1148031C Multi-media information communication system |
| 04/27/2004 | US6728373 Differential output stage for electronic equipment providing a remote power feed to a terminal |
| 04/27/2004 | US6728372 Wire bound telecommunications device and a power supply circuit |
| 04/27/2004 | US6728371 Method and apparatus for stabilization of a line powered modulator circuit |
| 04/27/2004 | US6728362 Continuity testing with call tone messaging in communication networks |
| 04/27/2004 | US6728354 Methods and devices for outputting audio announcements using CID related and other reference parameters |
| 04/22/2004 | US20040077342 Method of compressing sounds in mobile terminals |
| 04/22/2004 | US20040076289 Tracking switchmode power converter for telephony interface circuit |
| 04/22/2004 | US20040076278 Communication terminal device, holds melody sensing method, incoming melody playing and information storing medium |
| 04/21/2004 | EP1411640A1 Method of compressing sounds in mobile terminals |
| 04/21/2004 | EP1410237A1 Method and apparatus to reduce processing requirements for the playback of complex audio sequences |
| 04/21/2004 | CN1147192C Telephone and contact mode mobile terminal operation |
| 04/21/2004 | CN1147116C Circuit for electronically generating call impedance |
| 04/21/2004 | CN1147107C Portable telecommunication apparatus for multiple audio accessories |
| 04/15/2004 | WO2004032460A2 Method for providing a subscriber-based ringback tone sound stored in a mobile exchanger |
| 04/15/2004 | WO2004031902A2 System and method for monitoring and handling telecommunication activity via a computer network |
| 04/15/2004 | US20040072598 Signal routing for reduced power consumption in a conferencing system |
| 04/15/2004 | US20040071283 Method and circuit arrangement for controlling a subscriber line interface circuit |
| 04/15/2004 | US20040071282 Method for adjusting a ringing signal current in a subscriber line and circuit arrangement |
| 04/15/2004 | US20040070547 Structure of dual magnetic loop type receiver |
| 04/15/2004 | DE20319204U1 Flexible solar energy collection film forms part of a laminated foil with magnetic backing for use in mounting |
| 04/14/2004 | EP1408711A1 Wireless telephone and wireless telephone system |
| 04/14/2004 | EP1408709A1 Electronic device update by establishing data connection with server via a mobile station |
| 04/13/2004 | US6720864 Wireless on-call communication system for management of on-call messaging and method therefor |
| 04/13/2004 | US6720863 Mobile electronic communication device with lights to indicate received messages |
| 04/13/2004 | CA2359340C A circuit to provide backup telephone service for a multiple service access system using a twisted pair |
| 04/08/2004 | US20040067751 Method and apparatus for using Caller ID information in a browser of a mobile communication device |
| 04/08/2004 | US20040066932 Intelligent multimode message alerts |
| 04/08/2004 | DE10240810B3 Verfahren und Schaltungsanordnung zum Steuern einer Teilnehmerleitungs-Schnittstellenschaltung Method and circuit for controlling a subscriber line interface circuit |
| 04/07/2004 | EP1405496A1 Subscriber identity module and terminal therefor |
| 04/07/2004 | CN2610583Y Micropower source with current supply by PSTN telephone wire on hang-up station |
| 04/07/2004 | CN2610582Y Current supply device by PSTN telephone wire |
| 04/07/2004 | CN1488229A 无线电话机及无线电话系统 Wireless telephones and wireless telephone systems |
| 04/07/2004 | CN1145392C Power supply method and device for mobile telephone |
| 04/07/2004 | CN1145348C Subscriber line interface circuit |
| 04/07/2004 | CN1145347C A mobile telephone method and system, and terminal used for the same system |
| 04/07/2004 | CN1145343C Interface circuit for telephone system |
| 04/07/2004 | CN1145335C System and method for broadcasting music accompanied light or vibration |
| 04/06/2004 | US6718186 Melody playing system |
| 04/01/2004 | WO2004027895A2 System and method for on-demand battery backup for cable telephony device |
| 04/01/2004 | US20040062384 Adaptive linefeed control for varying load on a subscriber loop |
| 03/31/2004 | EP1402652A1 Telephone and method for converting sound to image and displaying on screen thereof |
| 03/31/2004 | CN1144500C Electro-mechanical-acoustic transducing device |
| 03/31/2004 | CN1144499C Electro-mechanical-acoustic transducer and prtable teminal unit |
| 03/30/2004 | US6714637 Customer programmable caller ID alerting indicator |
| 03/30/2004 | US6714123 Electronic device incorporating vibration generator |
| 03/25/2004 | WO2004025930A1 Multi-mode communication terminal |
| 03/25/2004 | US20040058718 Method for giving notice of an incoming call in a mobile communication terminal |
| 03/25/2004 | US20040057576 System and method for on-demand battery backup for cable telephony device |
| 03/25/2004 | US20040057524 Digital isolation system with ADC offset calibration |
| 03/25/2004 | US20040057235 Gradually lighting/dimming wireless transmission indicator lamp |
| 03/25/2004 | DE10242903A1 Wireless signal transmission method for transmitting stage instructions from a director to members of a cast in a scene sends silent stage directions signaled by a vibratory pulse on a receiver |
| 03/24/2004 | EP1401185A1 Method for giving notice of an incoming call through a specific vibration pattern in a mobile communication terminal |
| 03/24/2004 | EP1401178A1 Wireless data transmission LED indicator |
| 03/24/2004 | CN1143580C Telecommunication terminal |