4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Photocell controlled circuit

Tohru Hanahara

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Detecting device for destructive vibration of structures

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Photoelectric smoke detector

Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent

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Profile ID: LFUS-PAI-P-1009463

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