| Patents for H04Q 1 - Details of selecting apparatus or arrangements (11,745) |
|---|
| 10/26/1976 | US3988687 Step-servoed tone detector |
| 10/26/1976 | US3988548 Dial pulse correction circuit for telephone signaling system |
| 10/26/1976 | US3988547 Telecommunication system having means for converting multifrequency selection signals into digital pulse trains |
| 10/19/1976 | US3987249 System for addressed timemultiplexed telecommunication |
| 10/12/1976 | US3986112 Novel technique for frequency detection utilizing switching filters |
| 10/12/1976 | US3985970 Regeneration of signalling pulses |
| 10/12/1976 | US3985966 Method and apparatus for generating digital dual frequency signals |
| 10/12/1976 | US3985965 Digital signal generator |
| 09/07/1976 | US3979562 Decoder |
| 08/31/1976 | US3978291 Automated main distributing frame system |
| 08/31/1976 | US3978283 Switching arrangement for receiving dc signals |
| 08/24/1976 | US3976843 MFC receiver digital signal processing |
| 07/27/1976 | US3971899 Signalling device for key telephone systems |
| 07/27/1976 | US3971897 Circuit arrangement for a selective signal receiver, particularly for use in telephone systems |
| 07/20/1976 | US3970802 Flexible circuit connecting arrangement for interconnection modules |
| 07/13/1976 | US3969592 Pushbutton-controlled call-number selector for dial-equipped telephone |
| 06/22/1976 | US3965457 Digital control processor |
| 06/15/1976 | US3963878 Signal interpreting system for frequency selective multifrequency tone dialing |
| 06/08/1976 | US3962541 Frequency sample-and-hold circuit |
| 06/01/1976 | US3961167 PCM tone receiver using optimum statistical technique |
| 06/01/1976 | US3961143 Multi-frequency signalling system |
| 06/01/1976 | US3961141 Stop time-out until after first DTMF digit dialed circuit |
| 05/25/1976 | US3959604 Digital calling signal tone generating circuitry |
| 05/25/1976 | US3959603 Decoder |
| 05/11/1976 | US3955868 Connector for telephone main distributing frame |
| 05/04/1976 | US3954237 Cable raceway for electric lines |
| 04/20/1976 | US3951496 Multiple connection electrical connector device |
| 04/06/1976 | US3949177 Method for frequency-recognition in selective signal receivers for use in telecommunication, particularly telephone systems |
| 03/30/1976 | US3947732 Connector block for telephone central office main distributing frame |
| 03/23/1976 | US3945706 Distribution frame for communication facilities |
| 03/16/1976 | US3944753 Apparatus for distinguishing voice and other noise signals from legitimate multi-frequency tone signals present on telephone or similar communication lines |
| 03/16/1976 | US3944176 Universal mounting backboard |
| 03/02/1976 | US3941944 Signalling device for key telephone systems |
| 03/02/1976 | US3941937 Dial pulse receiver |
| 02/10/1976 | US3937899 Tone detector using spectrum parameter estimation |
| 02/10/1976 | US3937895 Circuit arrangement for detecting double connections in digital telecommunication switching systems |
| 02/03/1976 | US3936801 Multifrequency signal receiver timing circuit |
| 02/03/1976 | US3936611 Time compression scanner |
| 01/27/1976 | US3935395 Selective signal receiver for use in telecommunication systems |
| 01/27/1976 | US3935392 Dial pulse detection method and apparatus |
| 01/20/1976 | US3934097 Multifrequency tone detection |
| 01/20/1976 | US3934096 Multi-frequency signal receiving circuit |
| 01/13/1976 | US3932713 Induction cancellation circuit |
| 01/13/1976 | US3932708 Frequency-selective signal receiver for communication equipments, more particularly telephone equipments |
| 01/06/1976 | US3931480 Time compression receiver |