4. Communications: electrical
  5. Condition responsive indicating system
  6. Specific condition

David A. Minnis

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Alarm silencing circuitry for photoelectric smoke detectors

Communications: electrical – Condition responsive indicating system – Specific condition
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Sensitivity test system for photoelectric smoke detector

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
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Profile ID: LFUS-PAI-P-1155023

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