4. Optics: image projectors
  5. Shutter

Yukihiko Hayakawa

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Light amount adjusting apparatus and projector using the same

Optics: image projectors – Shutter
Reexamination Certificate

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Light amount control apparatus and projector apparatus using...

Optics: image projectors – Light shield – mask – hood – or diaphragm
Reexamination Certificate

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Light quantity adjusting device

Photography – Camera detail – Diaphragm
Reexamination Certificate

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Light quantity adjusting device and projector apparatus...

Optics: image projectors – Shutter
Reexamination Certificate

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