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

Ronald G. Avery

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Infrared intrusion detector with optical pattern locators

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent

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Infrared intrusion detector with response indicator light

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
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Intrusion detector

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

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Passive infrared intrusion detector unit

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
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Profile ID: LFUS-PAI-P-832429

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