Number | Name | Date | Kind |
---|---|---|---|
4935955 | Neudorfer | Jun 1990 | |
4969184 | Gordon et al. | Nov 1990 | |
4994926 | Gordon et al. | Feb 1991 | |
5062134 | Laird | Oct 1991 | |
5077607 | Johnson et al. | Dec 1991 |
Number | Date | Country |
---|---|---|
0360732 | Mar 1990 | EPX |
3230609 | Apr 1984 | DEX |
Entry |
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Ericsson Review, vol. 61, No. 1, Dec. 31, 1984, Stockholm (SE), pp. 51-58, R. Dietsch "Hotel Communication System". |
The article "SR100 PBX", Nov. 1987, p. 17. |