4. Optics: measuring and testing
  5. Photometers
  6. Photoelectric

Ichiro Yoshiyama

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Binocular system with automatic diopter power adjustment

Optical: systems and elements – Compound lens system – Telescope
Patent

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Electronic flash device

Electric lamp and discharge devices: systems – Condenser in the supply circuit – Condenser in shunt to the load device and the supply
Patent

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Exposure meter

Optics: measuring and testing – Photometers – Photoelectric
Patent

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Exposure meter

Optics: measuring and testing – Photometers – Photoelectric
Patent

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Profile ID: LFUS-PAI-P-195046

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