4. Communications: electrical
  5. Systems
  6. Audible signals

Richard N. Quirino

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Intelligent door plate and chime

Communications: electrical – Systems – Audible signals
Reexamination Certificate

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System and method for managing services and facilities in a...

Communications: electrical – Condition responsive indicating system – Specified power supply
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System and method for managing services and facilities in a...

Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2910532

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