| Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223) |
|---|
| 02/27/1990 | US4905003 Analog/digital data storage system |
| 02/27/1990 | US4904549 Battery housing with integral latch and positive displacement apparatus |
| 02/27/1990 | US4904210 Telecommunications connector |
| 02/27/1990 | US4904201 Telecommunications connector |
| 02/22/1990 | WO1990001841A1 Transient signal eliminating circuit for telecommunications applications |
| 02/22/1990 | WO1990001840A1 Keypad/dialer interface for telephone test |
| 02/22/1990 | WO1990001839A1 Adjustable telephone handset cradle |
| 02/22/1990 | DE3828173A1 Labelling arrangement for destination keys on communication terminals |
| 02/21/1990 | CN2053415U Subscriber's circuit card for dispatching switchboard of auto-telephone at coal mine |
| 02/21/1990 | CN2053414U Automatic magneto telephone set |
| 02/20/1990 | US4903326 Detachable battery pack with a built-in broadband antenna |
| 02/20/1990 | US4903325 Portable wireless communication apparatus |
| 02/20/1990 | US4903319 Portable radio telephone having power saver |
| 02/20/1990 | US4903291 Automatic on-hook arrangement |
| 02/20/1990 | US4903290 Device for mounting a telecommunications device for the deaf in a public phone booth |
| 02/20/1990 | US4903289 Telephone equipment with multiple function |
| 02/14/1990 | EP0354703A2 Information processing apparatus |
| 02/14/1990 | EP0354367A2 Telephone with automatic dialing push buttons |
| 02/14/1990 | CN2052994U Inductive moveable telephone set |
| 02/13/1990 | US4901355 Combination multiple supported variable position audio intake control devices |
| 02/13/1990 | US4901346 Computer controlled speakerphone for adapting to a communication line |
| 02/13/1990 | US4901345 Telephone set usable as an acoustic coupler |
| 02/13/1990 | US4901068 Data processing apparatus for enabling/disabling secured equipment |
| 02/13/1990 | US4901003 Telecommunications wiring test apparatus and method including two color display indicating correct wiring |
| 02/13/1990 | CA1265882A1 Telephone set |
| 02/08/1990 | WO1990001236A1 Personal signalling telephone |
| 02/08/1990 | DE3826570A1 Handset |
| 02/08/1990 | DE3826569A1 Handset |
| 02/08/1990 | DE3826294A1 Hands-free device for communications systems |
| 02/08/1990 | DE3826100A1 Controlled telephone barring device |
| 02/07/1990 | EP0354049A2 Radio telephone apparatus |
| 02/07/1990 | EP0353808A1 Current compensating circuit |
| 02/07/1990 | EP0353618A2 Data storage apparatus |
| 02/06/1990 | US4899381 Single-line telephone hold circuit |
| 02/06/1990 | US4899380 Loudspeaking telephone with a variable gain circuit |
| 02/06/1990 | US4899378 Telephone announcement system |
| 02/06/1990 | US4899377 Communication terminal telephone directory with dynamic directory tabbing |
| 02/06/1990 | US4899372 Multi use telephone extension control circuit and device providing lockout for privacy |
| 02/06/1990 | US4899368 Switching mechanism for electrical devices |
| 02/06/1990 | US4899358 Call announcement arrangement |
| 02/01/1990 | DE3826002A1 Circuit arrangement for feeding an amplifier from the public telephone network |
| 02/01/1990 | DE3825898A1 Method for dynamic allocation of function keys to telephone terminal functions which can be invoked by said keys |
| 02/01/1990 | DE3825895A1 Telephone terminal with function keys |
| 01/31/1990 | EP0353143A1 Telecommunication terminal with modified function control |
| 01/31/1990 | EP0352914A2 Telephone handset with full page video display |
| 01/31/1990 | EP0352913A2 Pocket data receiver with full page visual display |
| 01/31/1990 | CN1006673B Omnidirectional self-adapting array signal processor |
| 01/30/1990 | US4897875 Key management system for open communication environments |
| 01/30/1990 | US4897873 Multipurpose hinge apparatus for foldable telephones |
| 01/30/1990 | US4897868 Public terminal receptacle |
| 01/30/1990 | US4897866 Telecommunication system with subscriber controlled feature modification |
| 01/30/1990 | US4897864 Control method and appartus for a radio telephone system |
| 01/30/1990 | US4897863 Cordless telephone antenna arrangement |
| 01/30/1990 | CA1265274A1 Radio key telephone system having a common signaling channel |
| 01/30/1990 | CA1265273A1 Integrated calling directory |
| 01/25/1990 | WO1990000844A1 A system for communicating and managing private data |
| 01/25/1990 | WO1990000843A1 Cordless telephone |
| 01/25/1990 | DE3824633A1 Circuit arrangement for an automatic changeover switch to connect two telephone sets |
| 01/24/1990 | EP0351863A2 Exterior structure for cabinet |
| 01/24/1990 | EP0351791A2 Auto-dialing apparatus |
| 01/24/1990 | CN2051806U Automatic dialing mechanism for telephones |
| 01/23/1990 | US4896352 Telephone set circuit including an overvoltage protection |
| 01/23/1990 | US4896060 Dialer with internal option select circuit programmed with externally hardwired address |
| 01/18/1990 | DE3922806A1 Telefonapparat mit tonerzeugungsvorrichtung Telephone with tone generating device |
| 01/18/1990 | DE3903418C1 Socket for an electrical connector |
| 01/17/1990 | EP0351060A2 Control panel structure for door telephones |
| 01/17/1990 | EP0350949A2 Control method for cordless telephone |
| 01/17/1990 | EP0350947A2 Radio channel control method |
| 01/17/1990 | CN2051421U Key type telephone locking tool |
| 01/17/1990 | CN1038907A Method and apparatus for electronic payphone open switch interval management |
| 01/16/1990 | US4894863 Method for gain control in telephone sets having an electronic speech circuit, and apparatus for performing the method |
| 01/16/1990 | US4894862 Signal compression circuit, particularly for a telephone set |
| 01/16/1990 | US4894861 Terminal in communication network for notifying originating party's number |
| 01/16/1990 | US4894858 Portable through-door intercom |
| 01/16/1990 | US4894856 Cordless telephone set operated under multi-channel access |
| 01/16/1990 | US4893488 Modular communications socket lock |
| 01/11/1990 | WO1990000340A1 Headphone with microphone |
| 01/11/1990 | WO1990000333A1 Method and apparatus for electronic payphone open switch interval management |
| 01/11/1990 | WO1990000298A1 Method and apparatus for programming devices to recognize voice commands |
| 01/11/1990 | DE3822848A1 Hand-held housing for a radiotelephone |
| 01/10/1990 | EP0350402A1 Personal computer integrating a digital ISDN subscriber terminal |
| 01/10/1990 | CN1006434B Pulse/direct current multiplexing circuit in key telephone system |
| 01/09/1990 | US4893348 Power source control device in car telephone mobile station system |
| 01/09/1990 | US4893344 Headset having a post auricle mount and arranged to be worn on a person's outer ear |
| 01/09/1990 | US4893337 Circuit arrangement for a digital telephone station |
| 01/09/1990 | US4893335 Remote access telephone control system |
| 01/09/1990 | US4893334 Intercommunication system for telephones |
| 01/09/1990 | US4893331 System allowing selective connection of various types of external apparatuses to telephone set |
| 01/09/1990 | US4893329 Call deferral system for telephones |
| 01/09/1990 | US4893317 Digital signals and frequency correction in a digital wireless system |
| 01/09/1990 | CA1264357A1 Radio telephone system control apparatus and method |
| 01/04/1990 | DE3844168C1 Chamber arrangement on communications terminals for the insertion of connection cables |
| 01/03/1990 | EP0349393A1 Double action switch |
| 01/03/1990 | EP0349346A2 Communication terminal apparatus and its control method |
| 01/03/1990 | EP0349336A2 Telephone handset with electrostatic discharge prevention |
| 01/03/1990 | EP0349302A2 Method and apparatus for electronic payphone open switch interval management |
| 01/03/1990 | EP0349162A2 Methods of generating waveforms |
| 01/03/1990 | EP0348956A2 A device for the exclusive use of a single telephone line by a telephone set in installations comprising a plurality of telephone sets |
| 01/03/1990 | CN2050668U Protective unit through hot melting open circuit |
| 01/02/1990 | US4891837 Voice control circuit for a communication terminal |