4. Measuring, testing, or signalling instruments
  5. Security or signal instrument or casing
  6. Aural, i.e., audible

Charles Chu

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2-D optical switch with lens mount

Optical waveguides – With optical coupler – Switch
Reexamination Certificate

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3D image feedback optical beam alignment

Optical waveguides – With optical coupler – Switch
Reexamination Certificate

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Alarm

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

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Alarm

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

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Alarm unit

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

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Profile ID: LFUS-PAI-P-449290

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