4. Optics: eye examining, vision testing and correcting
  5. Spectacles and eyeglasses
  6. Ophthalmic lenses or blanks
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Light-absorbing and anti-reflective coating for sunglasses

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent

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Light-occluding contact lens

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent

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Lightweight laminated photochromic lenses

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent

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Liquid crystal spectacles

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent

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Liquid-crystal image director for single-lens-reflex camera

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent

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Low inventory method of making eyeglasses

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate

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Low-mass ophthalmic lens

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate

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Low-mass ophthalmic lens

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate

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