4. Optical: systems and elements
  5. Lens
  6. With variable magnification

Cheon-Ho Park

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Fast photographic lens system

Optical: systems and elements – Lens – Multiple component lenses
Patent

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Objective lens with the diffractive surface for DVD/CD...

Optical: systems and elements – Lens – Including a nonspherical surface
Reexamination Certificate

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Wide-angle photographic lens system

Optical: systems and elements – Lens – Reverse telephoto
Patent

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Zoom lens system

Optical: systems and elements – Lens – With variable magnification
Patent

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Zoom lens system

Optical: systems and elements – Lens – With variable magnification
Patent

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Profile ID: LFUS-PAI-P-438522

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