Number | Date | Country | Kind |
---|---|---|---|
4201561 | Jan 1992 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3912875 | Katz | Oct 1975 | |
4233473 | Frost | Nov 1980 | |
4284848 | Frost | Aug 1981 | |
4955050 | Yamauchi | Sep 1990 | |
4980907 | Raith et al. | Dec 1990 | |
5040177 | Martin et al. | Aug 1991 | |
5133001 | Bohm | Jul 1992 | |
5202912 | Breeden et al. | Apr 1993 |
Number | Date | Country |
---|---|---|
0159423 | Oct 1985 | EPX |
0374787 | Jun 1990 | EPX |
3528886 | Feb 1987 | DEX |
3843565 | Jan 1990 | DEX |
4113596 | Jul 1991 | DEX |
2236454 | Apr 1991 | GBX |
Entry |
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"Verbindungsverkehr zwischen Fernsprech-Nebenstellenanlagen-Netzplanung, Numerierung und Ubertragungstechnik", V. Jager et al, Telefon Report 13, (1977) Heft 2, pp. 55-60. |
"A Business Cordless PABX Telephone System on 800 MHz Based on the DECT Tecnhology" by Colin Buckingham, et al, published in the Jan. 1991 IEEE Communications Magazine, pp. 105-110. |