4. Radiant energy
  5. Invisible radiant energy responsive electric signalling
  6. Infrared responsive

William Kahl

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Ceiling mounted passive infrared intrusion detector with prismat

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

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Ceiling mounted passive infrared intrusion detector with pyramid

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

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Lighting control system with infrared occupancy detector

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
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Profile ID: LFUS-PAI-P-1304019

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