4. Plastic and nonmetallic article shaping or treating: processes
  5. Optical article shaping or treating
  6. Including step of mold making

Tadahiko Ryuugou

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Fresnel lens, screen, image display device, lens mold...

Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Including step of mold making
Reexamination Certificate

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Fresnel lens, screen, image displaying device, lens forming...

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

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Profile ID: LFUS-PAI-P-2710695

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