4. Optics: eye examining, vision testing and correcting
  5. Spectacles and eyeglasses
  6. Floating or underwater type

Philip Nolan

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Lens system for diver's mask

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Floating or underwater type
Patent

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Lens system for diver's mask

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Floating or underwater type
Patent

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Plano-convex lens system for underwater diving mask

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Floating or underwater type
Reexamination Certificate

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Profile ID: LFUS-PAI-P-275502

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