4. Measuring, testing, or signalling instruments
  5. Security or signal instrument or casing
  6. Alarm or control thereof

Albert K. H. Au

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Electronic alarm

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
Patent

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Electronic intrusion alarm transmitter

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
Patent

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Family pager receiver device or similar article

Recording – communication – or information retrieval equipment – Computer – data processor equipment
Patent

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Family pager transmitter device or similar article

Recording – communication – or information retrieval equipment – Computer – data processor equipment
Patent

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Profile ID: LFUS-PAI-P-714251

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