4. Optics: eye examining, vision testing and correcting
  5. Spectacles and eyeglasses
  6. Ophthalmic lenses or blanks

John A. Futhey

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Asymmetric alternating prism arrays

Illumination – Light modifier – Refractor
Reexamination Certificate

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Asymmetric alternating prism arrays

Illumination – Revolving
Reexamination Certificate

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Diffractive lens

Patent

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Individualized teaching system utilizing electrical continuity

Patent

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Luminaire system

Illumination – Light modifier – Refractor
Reexamination Certificate

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Profile ID: LFUS-PAI-P-543457

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