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Telephone security system

Telephonic communications – Emergency or alarm communications
Reexamination Certificate

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Telephone system and method for reliable emergency services...

Telephonic communications – Emergency or alarm communications
Reexamination Certificate

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Telephone with built-in emergency panic switch, long distance to

Telephonic communications – Emergency or alarm communications – With automatic dialing or transmission of recorded audio...
Patent

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Telephone-controlled electrical switch

Telephonic communications – Emergency or alarm communications – Responsive to sensed nonsystem condition
Patent

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Tone-responsive circuit for activating an instrumentality interf

Telephonic communications – Emergency or alarm communications – Responsive to sensed nonsystem condition
Patent

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Transaction safety system for falsely indicating successful comp

Telephonic communications – Emergency or alarm communications
Patent

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Two-way voice and voice over IP receivers for alarm systems

Telephonic communications – Emergency or alarm communications
Reexamination Certificate

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United home security system

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

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Universal emergency number ELIN based on network address ranges

Telephonic communications – Emergency or alarm communications
Reexamination Certificate

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Universal line status monitoring and response system

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Patent

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Variable configuration portable telephone

Telephonic communications – Emergency or alarm communications – Personal monitoring
Patent

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Visual communication system and its main apparatus

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Wireless phone-interface device

Telephonic communications – Emergency or alarm communications
Reexamination Certificate

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