4. Optics: eye examining, vision testing and correcting
  5. Eye examining or testing instrument
  6. Subjective type

B. D. Bogdon

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Compact refraction instrument

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – For fusion and space perception testing
Patent

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Compact refraction instrument

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent

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Concentric drums target support system for ophthalmic instrument

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent

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N-Vinyl lactam based biomedical devices

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent

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Profile ID: LFUS-PAI-P-710291

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