Key telephone system

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H04Q2213/334

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HELECTRICITY H04Electric communication H04QSELECTING H04Q2213/00Indexing scheme relating to selecting arrangements in general and for multiplex systems

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H04Q2213/334Key telephone system

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Patents Grantslast 30 patents

Information Patent Grant
Digital telephone system with terminals connected to a digital exch...
- Patent number 5,402,483
- Issue date Mar 28, 1995
- Siemens Aktiengesellschaft
- Gunter Weinberger
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Terminal adapter pooling system for ISDN
- Patent number 5,319,700
- Issue date Jun 7, 1994
- Kabushiki Kaisha Toshiba
- Hiroshi Mano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents