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

Randwal Instrument Co., Inc.

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Apparatus for position encoding

Optics: measuring and testing – By polarized light examination – With light attenuation
Patent

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Apparatus for position encoding

Optics: measuring and testing – By polarized light examination – With light attenuation
Patent

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Ophthalmic testing devices

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

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Retinal acuity testing device

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

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