4. Communications: electrical
  5. Condition responsive indicating system
  6. With particular coupling link

Hilario S. Costa

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Apparatus and method for activating a non-contact switch...

Communications: electrical – Systems – Manual alarm telegraph; e.g. – other than signal box type
Reexamination Certificate

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Audio communication system for a life safety network

Electrical audio signal processing systems and devices – One-way audio signal program distribution – Multiple channel
Patent

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Auto synchronous output module and system

Communications: electrical – Condition responsive indicating system – With particular system function
Patent

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Automatic addressing in life safety system

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

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Ceiling speaker

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Speaker or housing therefor
Design Patent

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Profile ID: LFUS-PAI-P-67325

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