| Patents for H04Q 3 - Selecting arrangements (38,975) |
|---|
| 07/20/1976 | US3970994 Communication switching system |
| 07/20/1976 | US3970800 Switching arrangement for ascertaining overlap prior to transfer of code digits in a telephone exchange |
| 07/13/1976 | US3969701 Function block oriented SPC system |
| 07/13/1976 | US3969589 Telephone switching system having attendant queuing facilities |
| 07/06/1976 | US3968335 Dial tone speed monitor |
| 06/29/1976 | US3967250 Control system of an electronic exchange |
| 06/29/1976 | US3967248 Arrangement for double-writing into a memory during data field relocation |
| 06/29/1976 | US3967075 Attendant board system in a telephone exchange |
| 06/29/1976 | US3967074 Telephone station identification system |
| 06/29/1976 | US3967073 PBX automatic number identification system |
| 06/29/1976 | US3967071 Switching system of stored program control type |
| 06/22/1976 | US3965458 Central processor for a telephone exchange |
| 06/22/1976 | US3965457 Digital control processor |
| 06/22/1976 | US3965305 Arrangement for increasing the call handling capabilities of a crosspoint tandem system |
| 06/22/1976 | US3965304 Intercept arrangement for key telephone systems |
| 06/22/1976 | US3965303 Scanning and distributing system for large centrally controlled switching exchanges |
| 06/15/1976 | US3964056 System for transferring data between central units and controlled units |
| 06/15/1976 | US3964055 Data processing system employing one of a plurality of identical processors as a controller |
| 06/15/1976 | US3963875 Universal answer arrangement for a PABX |
| 06/15/1976 | US3963874 Busy-test arrangement for electronic private automatic branch exchange |
| 06/15/1976 | US3963873 Local transfer arrangement for electronic private automatic branch exchange |
| 06/15/1976 | US3963872 Non-symmetric folded four-stage switching network |
| 06/08/1976 | US3962552 Switching network and peripheral circuits for telecommunications system |
| 06/01/1976 | US3961144 Exclusion circuit in key telephone system |
| 06/01/1976 | US3961141 Stop time-out until after first DTMF digit dialed circuit |
| 05/25/1976 | US3959598 Identification forwarding circuit for use with tone-to-pulse converters |
| 05/25/1976 | US3959510 Beverage clouding agents based on natural gum resins |
| 05/18/1976 | US3958111 Remote diagnostic apparatus |
| 05/18/1976 | US3958086 Telephone-signal receiver for switching exchanges having centralized logic circuits |
| 05/11/1976 | US3956595 Circuitry for providing executive ringback in a PBX system |
| 04/27/1976 | US3953813 Electromagnetic switch matrix device |
| 04/27/1976 | US3953727 System for transmitting independent communication channels through a light-wave medium |
| 04/20/1976 | US3952165 Tie trunk control arrangement |
| 04/06/1976 | US3949176 Method of and apparatus for all busy detection |
| 03/30/1976 | US3947643 Method of providing dialtone first on step by step telephone systems |
| 03/23/1976 | US3946163 Port multiplexer for telephone signal processing systems |
| 03/16/1976 | US3944752 Telephone line status indicator |
| 03/16/1976 | US3944751 Telephone private branch exchange system |
| 03/16/1976 | US3944750 Circuitry for providing call override in a PBX system |
| 03/16/1976 | US3944746 Collecting switching system call data |
| 03/09/1976 | US3943299 Link network |
| 03/09/1976 | US3943297 Electronic private automatic branch exchange |
| 03/02/1976 | US3942040 Semiconductor speech path switch circuitry |
| 03/02/1976 | US3941952 Telephone exchange system employing means capable of breaking a connection between a terminal unit and a switch frame using mechanical latching type crossbar switches |
| 03/02/1976 | US3941949 Method and apparatus for isolating malfunctions occurring in sender-receiver communication switching system equipment |
| 03/02/1976 | US3941947 Connection unit for time division switching system |
| 03/02/1976 | US3941940 Transient suppressor |
| 03/02/1976 | US3941938 Time shared TCMF and MF decoder |
| 02/24/1976 | US3940749 Circulatory storage network for coded data |
| 02/24/1976 | US3940571 Drive circuitry with error detection |
| 02/24/1976 | US3940569 Programmable toll restrictor |
| 02/24/1976 | US3940568 Circuit arrangement for telephone exchange installations with central control means and a plurality of individual apparatuses having a common information communication line connecting the individual apparatus to the central control means |
| 02/17/1976 | US3939306 Videotelephone system with centralized synchronization control |
| 02/10/1976 | US3937908 Network path test circuit |
| 02/10/1976 | US3937895 Circuit arrangement for detecting double connections in digital telecommunication switching systems |
| 02/10/1976 | US3937892 Electronic time-division-multiplexed pabx telephone system |
| 02/03/1976 | US3936615 Trunk transfer circuit |
| 02/03/1976 | US3936613 Camp-on detecting system for automatic telephone exchange |
| 02/03/1976 | US3936612 Control and holding circuit for relay matrices |
| 02/03/1976 | US3936611 Time compression scanner |
| 02/03/1976 | US3936602 Full duplex data transmission system using two speeds of diphase signal for simplified sync |
| 01/27/1976 | US3935396 Key telephone system using time division and space division control |
| 01/27/1976 | US3935394 Network routing and control arrangement |
| 01/27/1976 | US3935393 Line condition signalling system |
| 01/20/1976 | US3934099 Bias, feedback and network arrangements for hybrid circuits |
| 01/20/1976 | US3934095 Method and system for short term queuing of telephone calls in automatic inter-city telephone call connection system |
| 01/20/1976 | US3934091 Automatic gain compensation in time division switching system |
| 01/13/1976 | US3932844 Common control switching system |
| 01/13/1976 | US3932712 Telephone transmission system |
| 01/06/1976 | US3931479 Telephone intercommunication system providing common access to a communication line |
| 01/06/1976 | US3931478 Telephone intercommunication system provided with a common communication line to which access is guarded |
| 01/06/1976 | US3931477 Telephone intercommunication systems |
| 01/06/1976 | US3931476 Method and system for automatically controlling the connection of inter-city telephone calls at a users facility |
| 01/06/1976 | US3931475 Electronic switches and switch networks |
| 01/06/1976 | US3931474 Tone injection circuit |