4. Photography
  5. Exposure control circuit
  6. Having plural photocells

Tadayoshi Ogawa

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Displacement sensing apparatus for a movable member

Optics: measuring and testing – By polarized light examination – With light attenuation
Patent

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Photo detective unit and electric apparatus using the same

Active solid-state devices (e.g. – transistors – solid-state diode – Responsive to non-electrical signal – Electromagnetic or particle radiation
Patent

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Photo detective unit and electric apparatus using the same

Active solid-state devices (e.g. – transistors – solid-state diode – Responsive to non-electrical signal – Electromagnetic or particle radiation
Reexamination Certificate

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Photo-detection methods and apparatus

Photography – Exposure control circuit – Having plural photocells
Patent

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Profile ID: LFUS-PAI-P-173064

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