4. Radiant energy
  5. Invisible radiant energy responsive electric signalling
  6. Including a radiant energy responsive gas discharge device

Yoshihiko Okuda

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Ionization type smoke sensing device

Communications: electrical – Systems – Call station
Patent

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Ionization type smoke sensing device

Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent

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Light scattering type smoke detector

Optics: measuring and testing – Inspection of flaws or impurities – Bore inspection
Patent

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Light scattering type smoke detector

Optics: measuring and testing – Refraction testing – Prism engaging specimen
Patent

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Optical sensor for detecting distance to an object including ana

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
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Profile ID: LFUS-PAI-P-714802

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