Number | Date | Country | Kind |
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4500989 | Dahod | Feb 1985 | |
4989202 | Soto et al. | Jan 1991 | |
5175767 | Landry | Dec 1992 | |
5499048 | Seo | Mar 1996 | |
5530748 | Ohmori | Jun 1996 | |
5673252 | Johnson et al. | Sep 1997 | |
5883944 | Burke et al. | Mar 1999 |
Number | Date | Country |
---|---|---|
29601274 | Feb 1997 | DE |
0647044 | Apr 1995 | EP |
Entry |
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“Stromversorgung.von Zustzgeräten am ISDN-Hauptanschluβ” by Dieter Klein, In: ntz, Bd. 41 1988, H-10, S. 566-569. |
“ISDN-Produkte für Europa”, telekom praxis 3/94, pp. 29-35, by Wolfgang Harderich, Peine. |