4. Plastic and nonmetallic article shaping or treating: processes
  5. Optical article shaping or treating

Pilkington Barnes Hind Inc.

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Annular mask contact lenses

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

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Annular mask contact lenses

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

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Contact lens designed to accommodate and correct for the effects

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

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Contact lenses and materials and methods of making same

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
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Contact lenses and materials and methods of making same

Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating
Patent

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