| Patents for H04M 19 - Current supply arrangements for telephone systems (7,475) |
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| 03/20/2002 | EP1189422A2 System and method for providing lifeline power service to digital subscriber line customers |
| 03/20/2002 | CN1341320A 电信终端 Telecommunications Terminal |
| 03/19/2002 | US6359983 Digital isolation system with data scrambling |
| 03/19/2002 | US6359550 Personal communication device and call process status signalling method |
| 03/14/2002 | US20020032020 Local and remote email alert apparatus and methods |
| 03/14/2002 | US20020031216 Subscriber loop range extension using negative-impedance repeaters |
| 03/14/2002 | US20020031213 Telephone exchange system with multiple lifelines |
| 03/13/2002 | CN1339933A Sounding equipment and method for radio communication system mobile terminal |
| 03/13/2002 | CN1339909A Telephone system and method for autoamtically detecting position control ring according to portable telephone set |
| 03/07/2002 | WO2002019676A1 Radio communication device |
| 03/07/2002 | US20020028684 Mobile communication terminal capable of executing location-related services |
| 03/07/2002 | US20020027009 Isolation apparatus for electronic equipment |
| 03/06/2002 | EP1183858A2 Slic architecture and interfaces |
| 03/06/2002 | EP1183854A2 Ground key detection circuit and method for interference-resistant detection of the activation of a ground key for telephones |
| 03/06/2002 | CN1080510C Circuit for controlling on-hook voltage by use of balanced amplifier without supplying constant current to balanced amplifier |
| 03/06/2002 | CN1080509C Method for off-hook detection during ringing |
| 03/05/2002 | US6353668 Method for optimizing stability of a line interface circuit in a telecommunications network |
| 03/05/2002 | US6353347 Power control circuit for a line driver |
| 03/05/2002 | US6352451 Jack assembly |
| 02/28/2002 | WO2001099394A8 Method of generating a ring signal in a subscriber line interface circuit |
| 02/28/2002 | WO2001069892A3 Line current protection circuit and method for linear and nonlinear hold circuit |
| 02/27/2002 | EP1182848A1 Portable telephone |
| 02/27/2002 | EP1020062B1 Visual alarm for a communication module |
| 02/27/2002 | CN1337839A Folding portable honeycomb telephone set |
| 02/27/2002 | CN1080032C Radio receiving terminal |
| 02/26/2002 | US6351639 Telephone whose setting details can be changed, and telephone capable of changing settings of called telephone |
| 02/26/2002 | US6351534 Power supply for telecommunications device |
| 02/26/2002 | US6351533 System and method for protecting devices connected to a telephone line |
| 02/26/2002 | US6351528 Integrated ringer for short telephone lines |
| 02/21/2002 | DE10039211A1 Mobile telephone ring tone volume adjustment method matches ring tone volume to ambient conditions by detecting ring tone signal echo |
| 02/20/2002 | EP1180896A1 Sound generating device and method for a mobile terminal of a wireless telecommuniation system |
| 02/20/2002 | CN1337115A Method of signalling arrival of a telephone signal by desired sound and doll's moving, and apparatus for the same |
| 02/19/2002 | CA2266900C Method and arrangement for controlling functions in a program-controlled circuit arrangement when the operating voltage fails |
| 02/14/2002 | WO2001054381A3 System and method for time-based information management in a wireless communication device |
| 02/14/2002 | US20020019743 Content distribution system and content distribution method |
| 02/14/2002 | US20020019250 Personalized incoming call signal for communication devices |
| 02/14/2002 | US20020019248 Communications device |
| 02/14/2002 | US20020019216 Foldable portable cellular phone |
| 02/14/2002 | US20020018557 External resistor and method to minimize power dissipation in DC holding circuitry for a communication system |
| 02/14/2002 | US20020018556 Method of generating ring tones using melody and communication terminal apparatus |
| 02/13/2002 | EP1179955A1 Method and a telecommunication apparatus for creating an alerting signal |
| 02/13/2002 | EP1179947A2 Foldable portable cellular phone |
| 02/13/2002 | CN1336081A Jack assembly |
| 02/12/2002 | US6347135 Apparatus and method for powering a telephone-based inbound telemetry device |
| 02/12/2002 | US6347133 Telephone answering device with timer control |
| 02/12/2002 | US6346791 Self-contained recharging device for portable telephone and/or battery and/or protective case |
| 02/07/2002 | US20020015489 System and method for power feeding a line coupled to an exchange |
| 02/07/2002 | DE10043284C1 Radio device for GSM mobile radio system has information indicator providing information status indication independent of operative state of display device |
| 02/06/2002 | EP1177673A1 Telephone-line based power supply system |
| 02/06/2002 | EP1177613A1 Telephone-line based power supply system |
| 02/06/2002 | CN1334670A Method and device for providing all-number loop with power supply optimization mode |
| 02/06/2002 | CN1078981C Communiations terminal apparatus and display method thereof |
| 02/05/2002 | CA2067535C Current limited subscriber interface circuit |
| 01/31/2002 | WO2002009393A2 Phone silence system |
| 01/31/2002 | DE10048712A1 Acoustic ring signal for mobile telephone in form of animal sounds corresponds to natural sound of animal, especially bird, is stored electronically or in another manner in mobile telephone |
| 01/30/2002 | EP1176792A1 Method and apparatus for providing an all digital loop with power-optimised mode |
| 01/30/2002 | EP1175772A1 Method of transferring melodic information to a terminal |
| 01/30/2002 | CN1333638A Portable mobile unit |
| 01/30/2002 | CN1078785C Integrated interface circuit for driving a subscriber line |
| 01/24/2002 | WO2002007412A1 Alert signal generation |
| 01/24/2002 | US20020010008 Wireless communication device having intelligent alerting system |
| 01/24/2002 | US20020009133 Method and apparatus for providing an all digital loop with power-optimised mode |
| 01/23/2002 | EP1173966A1 Subscriber line interface circuitry |
| 01/23/2002 | CN1078417C Method and apparatus for determining deviation of longitudinal signal compounts from predetermined value |
| 01/22/2002 | CA2068971C Telephone circuit assembly with hook-off detector circuit |
| 01/17/2002 | WO2001047236A3 Remote line feeding |
| 01/17/2002 | US20020006207 Portable device and method of providing user with information on operation of portable device |
| 01/17/2002 | DE4435978C2 Verfahren und Vorrichtung für Leistungsmanagement und Netzwerksteuerung eines ISDN-Telefons Method and apparatus for power management and network control an ISDN telephone |
| 01/16/2002 | EP1173041A2 Electro-mechanical-acoustic transducing device |
| 01/16/2002 | EP1172991A1 Wireless communication device |
| 01/16/2002 | CN1331881A Circuit for electronically generating call impedance |
| 01/10/2002 | WO2002003374A1 A method for generating a musical tone |
| 01/10/2002 | US20020004384 Mobile communications terminal device and method for identifying incoming call for use with the same |
| 01/10/2002 | US20020003873 System and method for providing power over a home phone line network |
| 01/10/2002 | DE10030273A1 Telecommunications terminal has illumination device(s) on wall of housing that radiates directed light and is activated to signal given state of telecommunications terminal |
| 01/09/2002 | EP1170930A1 Apparatus and method for modulating the backlight illumination in an electronic autonomous device |
| 01/09/2002 | EP1078444A4 Pwm controller for use with open loop dc to ac converter |
| 01/08/2002 | CA2232646C Automatic determination of audio or vibration alerting for an incoming call in a wireless handset |
| 01/03/2002 | DE19848606C2 Schaltungsanordnung zur elektronischen Erzeugung einer Rufimpedanz Circuit arrangement for electronically generating a ringing impedance |
| 01/02/2002 | WO2002097789A1 Musical sound reproducer and mobile terminal |
| 01/02/2002 | EP1168783A2 Portable device and method of providing user with information on operation of portable device |
| 01/02/2002 | EP1168779A2 Telecommunication terminal |
| 01/02/2002 | EP1168775A2 A communications device |
| 01/02/2002 | CN1329450A Portable telephone capable of changing function according to its self-detected geographical position |
| 01/01/2002 | CA2249911C System for providing power to a wireless system |
| 12/27/2001 | WO2001099394A1 Method of generating a ring signal in a subscriber line interface circuit |
| 12/27/2001 | WO2001099391A1 Communication terminal device, hold melody sending method, incoming melody playing method and information storing medium |
| 12/27/2001 | US20010055974 Telephone system and method for selectively ringing one or more land phones or portable phones based on the self-detected geographical position of a portable phone |
| 12/27/2001 | US20010055377 Telephone line on-hook event detector |
| 12/25/2001 | US6333981 Shelf driver unit and method |
| 12/25/2001 | US6333664 Low operating power, high voltage ringing switch circuit |
| 12/25/2001 | US6333459 Isolation apparatus for electronic equipment |
| 12/23/2001 | CA2351242A1 Subscriber loop range extension using negative-impedance repeaters |
| 12/20/2001 | WO2001097491A1 Visual notification device for a portable phone |
| 12/20/2001 | US20010053692 Portable mobile unit |
| 12/20/2001 | US20010053205 Subscriber circuit having splitter disconnection function |
| 12/20/2001 | DE10024957A1 Insertable integrated services digital network (ISDN) module, is supplied with power from digital telephone network during standard operation or emergency power-supply operation |
| 12/19/2001 | EP1163729A1 Bus driver with data dependent drive strength control logic |
| 12/19/2001 | CN1327347A Mobile communication terminal device and method for identifying input call thereof |
| 12/19/2001 | CN1076562C Power supply controller for an optical fibre telecommuniations system |