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

Clement Clark International Ltd.

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Ophthalmic instruments

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

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Peak flow meter for measuring ventilatory capacity

Measuring and testing – Volume or rate of flow – Using differential pressure
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Peak flow meters

Surgery – Diagnostic testing – Respiratory
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