| Patents for H04M 11 - Telephonic communication systems specially adapted for combination with other electrical systems (53,055) |
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| 05/02/1991 | EP0425163A2 Customer programmable automated integrated voice/data technique for communication systems |
| 05/02/1991 | EP0425161A2 Customer definable integrated voice/data call transfer technique |
| 05/02/1991 | EP0424994A2 Automatic meter reading system with malfunction protection |
| 05/02/1991 | EP0424880A2 A communication system comprising a called receiver and a communication apparatus |
| 05/02/1991 | EP0424743A2 Audio-video data interface for a high speed communication link in a video-graphics display window environment |
| 05/01/1991 | CN1051110A Automatic acquisition processing system for measuring meter |
| 04/30/1991 | US5012510 Dynamic callback technique |
| 04/30/1991 | US5012508 Telephonic speech training device |
| 04/30/1991 | US5012507 Telephone activated emergency light system |
| 04/30/1991 | US5012402 System for modifying a machine's program at a remote location |
| 04/24/1991 | EP0424273A1 Method and apparatus for maintaining an access control device for a building |
| 04/24/1991 | EP0424015A2 Multilocation queuing for telephone calls |
| 04/24/1991 | EP0423410A1 Method for data transmission on an internal workstation bus, device with an internal bus using this method and adaption circuit for this internal bus |
| 04/24/1991 | CN2075837U Interface path for micro computerised telephone system |
| 04/23/1991 | US5010568 Remote meter reading method and apparatus |
| 04/23/1991 | US5010399 Video transmission and control system utilizing internal telephone lines |
| 04/21/1991 | CA2028232A1 Maintenance process of a building access control device, and control device for implemcating same |
| 04/20/1991 | CA2001114A1 Automatic information receiving terminal device for use in character/graphic information network system |
| 04/17/1991 | CN1012412B High speed half duplex modem with fast turnaround protocol |
| 04/16/1991 | US5008930 Customer definable integrated voice/data call transfer technique |
| 04/16/1991 | US5008927 Computer and telephone apparatus with user friendly computer interface integrity features |
| 04/16/1991 | US5008924 Telecommunications terminal with improved control functions |
| 04/16/1991 | US5008901 Asymmetrical duplex error-controlled modem |
| 04/16/1991 | US5008871 Dictate/transcribe control for digital dictation system |
| 04/16/1991 | US5007506 Elevator remote-control method |
| 04/16/1991 | CA1283230C Automatic call routing device |
| 04/10/1991 | EP0421912A2 Emergency mobilization system |
| 04/10/1991 | CN2074958U Telephone alarming device |
| 04/06/1991 | WO1991005302A1 A method of controlling access to restricted access data and communication system therefor |
| 04/03/1991 | EP0420527A2 Electronic messaging systems with additional message storage capability |
| 04/02/1991 | US5005199 To be carried and used on the person |
| 03/27/1991 | EP0419363A1 Pulse dialling device for an apparatus connected to a telephone line |
| 03/27/1991 | EP0418831A2 Paging method in a private branch exchange with a paging device providing operation modes for paging different from each other |
| 03/27/1991 | EP0418225A1 Security system comprising a signal transmitter. |
| 03/26/1991 | US5003593 Teleconferencing method for a secure key management system |
| 03/26/1991 | US5003582 Method of adjusting the end of transmission in a modem |
| 03/26/1991 | US5003581 Telephone line priority sharing device |
| 03/26/1991 | US5003580 Adapter for interfacing a work station terminal to a key telephone system |
| 03/26/1991 | US5003384 Set-top interface transactions in an impulse pay per view television system |
| 03/26/1991 | CA1282195C Apparatus and method for flexible data base access |
| 03/21/1991 | DE3935745C1 Transferring data between telephone subscribers - switching through exchange battery voltage when interface line delivers data terminal appts. ready signal |
| 03/20/1991 | EP0418168A1 Remote monitoring device for monotoring the power supply of an electrical apparatus |
| 03/20/1991 | EP0418165A1 A reconfigurable modem for a computer or the like |
| 03/20/1991 | EP0417515A2 A polymeric security window with an integrated intrusion detector |
| 03/20/1991 | EP0417362A1 Data/facsimile telephone subset apparatus incorporating electrophoretic display |
| 03/19/1991 | US5001746 Transmission control unit |
| 03/19/1991 | US5001745 Method and apparatus for programmed audio annotation |
| 03/19/1991 | US5001744 Communication system having a first and second communication procedures |
| 03/19/1991 | US5001729 High speed half duplex modem with fast turnaround protocol |
| 03/19/1991 | US5001710 Customer programmable automated integrated voice/data technique for communication systems |
| 03/13/1991 | EP0416598A2 Facsimile apparatus |
| 03/13/1991 | EP0416482A2 Automatic trading method and apparatus |
| 03/13/1991 | EP0416129A1 Switching system for application service |
| 03/13/1991 | EP0416013A1 Multimode modem. |
| 03/13/1991 | EP0211849B1 Pager system and communication protocol |
| 03/12/1991 | US4999836 ISDN network termination unit enabling to establish data link between one terminal equipment and other terminal equipments connected to the unit without use of subscriber line |
| 03/12/1991 | US4999613 Remote confinement system |
| 03/07/1991 | WO1991003136A1 Method of, and primary station for, operating a telephone system |
| 03/07/1991 | WO1991003118A1 Emergency call locating system |
| 03/06/1991 | EP0415723A2 Automatic switching apparatus between data and speech communication |
| 03/06/1991 | CN2072752U Multipath triggering telephone alarm device |
| 03/06/1991 | CN1049762A Emergency reciprocal communication apparatu for elevator |
| 03/05/1991 | US4998273 Telephone line called number recognizer |
| 03/05/1991 | US4998205 Method and apparatus for inserting data into electronic taximeters from a central computer temporarily connected to a local terminal |
| 02/27/1991 | CN1049577A Village electric power monitor system with broadcasting network adopted as communication channel |
| 02/26/1991 | US4996706 Method of controlling the electric power supplied to a modem |
| 02/26/1991 | US4996704 Electronic messaging systems with additional message storage capability |
| 02/26/1991 | US4996703 Remote supervisory monitoring and control apparatus connected to monitored equipment |
| 02/26/1991 | US4996697 Deglitching means for digital communication systems |
| 02/20/1991 | EP0413369A1 A portable pager |
| 02/20/1991 | EP0413090A1 Vehicle alarm device comprising one or several detectors |
| 02/19/1991 | US4995109 Communication with a non-telephone terminal via a telephone switching network using two consecutive calls |
| 02/19/1991 | US4995074 Switched line modem interface system |
| 02/19/1991 | US4994926 Facsimile telecommunications system and method |
| 02/19/1991 | US4994802 Subscriber unit for wireless digital telephone system |
| 02/13/1991 | EP0412574A2 Antenna for watch pager system |
| 02/13/1991 | CN1011654B Third-class facsimile repeater |
| 02/12/1991 | US4993063 Channel unit interface circuit |
| 02/12/1991 | US4993059 Alarm system utilizing wireless communication path |
| 02/12/1991 | US4993058 Phone activated emergency signaling system |
| 02/12/1991 | CA1280229C Infrared hookswitch for a telephone |
| 02/12/1991 | CA1280194C Paging system for electronic telephone apparatus |
| 02/07/1991 | WO1991001604A1 Paging message interface and missed message retrieval method |
| 02/07/1991 | WO1991001600A1 Digital added main line system |
| 02/07/1991 | CA2064894A1 Paging message interface and missed message retrieval method |
| 02/06/1991 | EP0410987A1 Set-top interface transactions in an impulse pay per view television system |
| 02/06/1991 | EP0138988B1 Simultaneous transmission of speech and data over an analog channel |
| 02/06/1991 | CN1049079A Digital added main line system |
| 02/05/1991 | US4991199 Computer and telephone apparatus with user friendly computer interface and enhanced integrity features |
| 02/05/1991 | US4991197 Method and apparatus for controlling transmission of voice and data signals |
| 02/05/1991 | US4991169 Real-time digital signal processing relative to multiple digital communication channels |
| 01/31/1991 | DE3924633A1 Data transmission to subscriber station over telephone network - from memory appts. with modem and electrical speech signal generator under control of memory management computer |
| 01/30/1991 | EP0410657A2 Apparatus and method for processing a freephone number telephone call |
| 01/30/1991 | EP0267267A4 Hospital signaling and communications system |
| 01/30/1991 | CN2070519U 数字报警电话 Digital alarm call |
| 01/30/1991 | CN1011464B Baseband local area network using ordinary telephone wiring |
| 01/30/1991 | CN1011461B Ensemble modem structure for imperfect transmission media |
| 01/29/1991 | US4989236 Transmission system for telephone communications or data transfer |
| 01/29/1991 | US4989232 Device for processing digital signal in audio-frequency bandwidth |
| 01/29/1991 | CA1279736C Terminal switching control apparatus |