Number | Name | Date | Kind |
---|---|---|---|
3618081 | Morrow | Nov 1971 | |
4376277 | Black | Mar 1983 | |
4823089 | Eckhaus et al. | Apr 1989 | |
4926162 | Pickell | May 1990 |
Entry |
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"Adaptive Design Engineering, Alarm and Telemetry Systems", AT&T Network Systems brochure, 1991; includes inserts on Personal Computer Alarm Monitoring Systems, Alarm Monitoring System, & Alarm Telemetry System |