4. Measuring, testing, or signalling instruments
  5. Time-measuring instrument or casing

Michael D. Sund

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Dusk delay system for outdoor motion detection

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

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Timer

Measuring – testing – or signalling instruments – Time-measuring instrument or casing
Patent

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Timer with sound and light activation

Measuring – testing – or signalling instruments – Time-measuring instrument or casing
Patent

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Profile ID: LFUS-PAI-P-684174

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