4. Telephonic communications
  5. Emergency or alarm communications
  6. Central station with plural substations

Scanner Chen

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Method for controlling united home security system

Communications: electrical – Continuously variable indicating – With meter reading
Patent

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Subscriber control unit for united home security system

Telephonic communications – Emergency or alarm communications – Central station with plural substations
Patent

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United home security system

Telephonic communications – Emergency or alarm communications – Central station with plural substations
Patent

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Profile ID: LFUS-PAI-P-706131

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