Signaling Or Calling Systems- Order Telegraphs- Alarm Systems- Patent map and technology intelligence report

Intellectual Property Exchange
September 1, 2010
15 Pages - SKU: ITR2800013
License type:
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.