| Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223) |
|---|
| 06/12/1990 | US4933966 Method and apparatus for performing an automated collect call |
| 06/12/1990 | US4933963 Radio telephone apparatus |
| 06/12/1990 | US4932882 Rotary plug |
| 06/07/1990 | DE3900996C1 Arrangement in communications terminals for swivelling visual display units |
| 06/06/1990 | EP0371708A2 An intermediate chassis for a mobile telephone handset |
| 06/06/1990 | EP0371662A2 Remote testing of metallic loops with a trans hybrid signal |
| 06/06/1990 | EP0371558A2 Circuit arrangement for transmission devices |
| 06/06/1990 | EP0371468A2 Side tone preventive circuit for telephone |
| 06/06/1990 | EP0371430A2 Holding sound generator for telephone |
| 06/06/1990 | EP0371358A2 Time delay compensation in a radio transceiver |
| 06/06/1990 | CN2058045U Switch for telephone swithboard and extension |
| 06/06/1990 | CN1042786A Parallel microcomputer of user digital terminal with digital network of centralization service |
| 06/05/1990 | US4932052 Self-adjusting headset-handset combination |
| 06/05/1990 | US4932050 Proximity detection for telecommunications features |
| 06/05/1990 | US4932048 Data communication apparatus with voice communication control |
| 05/30/1990 | EP0370423A2 Device for forming an interchange point in a telecommunications network |
| 05/30/1990 | CN2057797U Multi-functional automatic controller of telephone set |
| 05/30/1990 | CN2057796U Sound force telephone |
| 05/29/1990 | US4930157 Telephone handset having apertures for key access |
| 05/29/1990 | US4930156 Telephone receiver transmitter device |
| 05/29/1990 | US4930155 Multiple redialing system |
| 05/29/1990 | US4930149 Cordless telephone communication system |
| 05/29/1990 | US4930148 Headband radiophone combination set |
| 05/28/1990 | CA2003947A1 Radio transceiver |
| 05/23/1990 | EP0369403A2 Button panel with composable modular elements, particularly for house-phone and house-videophone systems |
| 05/23/1990 | EP0369123A2 Flexless telephone |
| 05/23/1990 | EP0369110A2 Mobile radio telephone |
| 05/22/1990 | US4928307 Time dependent, variable amplitude threshold output circuit for frequency variant and frequency invariant signal discrimination |
| 05/22/1990 | US4928306 Dynamically configurable telephone |
| 05/22/1990 | US4928302 Voice actuated dialing apparatus |
| 05/22/1990 | US4926961 Use with communications equipment |
| 05/17/1990 | WO1990005421A1 Multipurpose hinge apparatus for foldable telephones |
| 05/17/1990 | WO1990005385A1 Battery housing with integral latch and positive displacement apparatus |
| 05/17/1990 | DE3936309A1 Datenkommunikation-endgeraet Data communication terminal |
| 05/16/1990 | EP0368291A1 An arrangement in two-way telephone communication |
| 05/16/1990 | CN2057298U Auto-answering type telephone direct call unit |
| 05/16/1990 | CN1042280A Transient signal elimination circuit for telecommunications applications |
| 05/15/1990 | US4926474 Ergonomic telephone handset |
| 05/15/1990 | US4926473 Longitudinal balance system |
| 05/15/1990 | US4926471 Communication system |
| 05/15/1990 | US4926470 Telephone call screening circuit |
| 05/15/1990 | US4926464 Telephone communication apparatus and method having automatic selection of receiving mode |
| 05/15/1990 | US4926463 Data communication apparatus having a reprogrammable voice memory |
| 05/15/1990 | US4926462 Telephone system |
| 05/15/1990 | US4926461 Telephone answering machine having call transfer capabilities |
| 05/15/1990 | US4926459 Hearing assist telephone |
| 05/09/1990 | EP0367611A2 Mechanical fastening system for an electronic equipment housing |
| 05/09/1990 | EP0367610A2 Multipurpose hinge apparatus for foldable telephones |
| 05/09/1990 | EP0367608A1 Battery housing with integral latch and positive displacement apparatus |
| 05/09/1990 | EP0367512A2 Dialer with internal option select circuit programmed with externally hardwired address |
| 05/09/1990 | EP0367455A2 Phone management server for use with a personal computer lan |
| 05/09/1990 | EP0366875A2 Wristwatch radiotelephone |
| 05/08/1990 | US4924512 Method and apparatus for preventing recognition of a telephone dialing signal |
| 05/08/1990 | US4924499 Timer control for telephone |
| 05/08/1990 | US4924496 Automatic incoming telephone call originating number and party display system |
| 05/08/1990 | US4924493 Method for monitoring call setup communications |
| 05/08/1990 | US4924489 Customer line tester |
| 05/08/1990 | US4924193 Volume control circuit for use in portable telephone or the like |
| 05/08/1990 | US4924044 Light emitting push button switch for an electronic apparatus |
| 05/03/1990 | WO1990004896A1 Processor-controlled telephone set |
| 05/03/1990 | DE3836406A1 Handset-shaped mobile operating unit |
| 05/02/1990 | EP0366584A2 Full-duplex digital speakerphone |
| 05/02/1990 | EP0366152A2 Cordless telephone |
| 05/02/1990 | EP0365904A1 Safety locking device |
| 05/02/1990 | EP0365741A2 Security Handset |
| 05/02/1990 | EP0365649A1 Apparatus and method for mapping the connectivity of communications systems with multiple communications paths |
| 05/01/1990 | US4922547 Microphone circuit |
| 05/01/1990 | US4922546 Radio audio/facsimile communication device |
| 05/01/1990 | US4922529 Automatic hangup apparatus for restoring service to off-hook telephones |
| 05/01/1990 | US4922527 Small electronic apparatus |
| 05/01/1990 | US4922490 Telephone station set |
| 05/01/1990 | US4922260 Adjustable watchband with embedded antenna |
| 05/01/1990 | US4921464 Radio channel search system |
| 05/01/1990 | CA1268571A1 Dial assembly for telephone sets |
| 05/01/1990 | CA1268569A1 Telephone equipment utilizing ear microphone |
| 05/01/1990 | CA1268552A1 Communication terminal telephone directory with dynamic directory tabbing |
| 05/01/1990 | CA1268361A1 Fiber-optic distribution system for broadband signals |
| 04/25/1990 | EP0365290A2 Vehicle sun visor telephone |
| 04/25/1990 | EP0365200A2 Telecommunication system with subscriber controlled feature modification |
| 04/25/1990 | EP0364935A1 Telephone transducer |
| 04/25/1990 | EP0364444A1 Internal communication system. |
| 04/25/1990 | CN1041676A Location-based adaptive radiotelephone control |
| 04/24/1990 | US4920564 Moisture barrier assembly |
| 04/24/1990 | US4920561 Ring detector for telephone line |
| 04/24/1990 | US4920559 Telephone answering device with remote control timing mark |
| 04/24/1990 | US4920558 Method and apparatus for downloading speech files |
| 04/24/1990 | US4920557 Radio communication apparatus |
| 04/24/1990 | US4920556 Telephone with built-in emergency panic switch, long distance toll timer and music on hold cards |
| 04/24/1990 | US4920555 Compact telephone line test apparatus |
| 04/24/1990 | US4920534 System for controllably eliminating bits from packet information field based on indicator in header and amount of data in packet buffer |
| 04/24/1990 | US4920427 Facsimile apparatus |
| 04/24/1990 | US4919624 Connection terminal structure of electronic equipment |
| 04/24/1990 | CA1268277A1 Telephone device and method for operating a telephone device |
| 04/24/1990 | CA1268275A1 Programmable telephone/dictation terminal and method of operating same |
| 04/24/1990 | CA1268274A1 Portable communication terminal for remote database query |
| 04/24/1990 | CA1268243A1 Modular jack for plug-in communication terminals and method of moulding same |
| 04/21/1990 | CA2001155A1 Telephone handset |
| 04/19/1990 | WO1990004299A1 A multi-purpose communications device |
| 04/19/1990 | WO1990004293A1 Location-based adaptive radio control |
| 04/19/1990 | DE3835187A1 Control of the tape drives of a telephone answering machine |