4. Telephonic communications
  5. Private or single line system
  6. Having transducer circuitry

Tatsuru Shinozaki

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Collective housing intercom apparatus

Telephonic communications – Private or single line system
Reexamination Certificate

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Intercom system for a building or apartment house

Telephonic communications – Private or single line system – Having transducer circuitry
Reexamination Certificate

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Television intercom system

Television – Special applications – Observation of or from a specific location
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2653631

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