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

Lewin A. Edwards

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Low-cost PIR scanning mechanism

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
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Method for synchronizing frequency-hopping short-range radio...

Communications: electrical – Condition responsive indicating system – With particular coupling link
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2331151

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