4. Optical: systems and elements
  5. Projection screen
  6. Unitary sheet comprising plural refracting areas

Naofumi Yamauchi

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Directional screen and image projection system

Optical: systems and elements – Projection screen
Reexamination Certificate

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Screen and image projection system

Optical: systems and elements – Projection screen – With reflector or additional screen
Reexamination Certificate

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Screen and image projection system using the same

Optical: systems and elements – Projection screen – With reflector or additional screen
Reexamination Certificate

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Screen and image projector using the screen

Optical: systems and elements – Projection screen – Unitary sheet comprising plural refracting areas
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