A notification system for reporting events occurring within a defined area being monitored thereby. The notification system includes a plurality of sensors installed at selected locations within the defined area and a sensor interface coupled to each of the sensors. The sensor interface periodically...http://www.google.de/patents/US5416725?utm_source=gb-gplus-sharePatent US5416725 - Computer-based notification system having redundant sensor alarm determination and associated computer-implemented method for issuing notification of events
