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Signaling Or Calling Systems, Order Telegraphs, Alarm Systems: Patent Map and Technology Intelligence Report
Intellectual Property Exchange (IPEXL), Sep 2010, Pages: 15
This report covers patents in the industry related to:
- Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for by interference with electromagnetic field distribution.
- Alarms responsive to unspecified undesired or abnormal conditions using electric transmission;
- Checking or monitoring of signalling or alarm systems;
- Prevention or correction of operating errors, e.g. preventing unauthorised operation;
- Alarm systems in which substations are interrogated in succession by a central station.
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