4. Optics: eye examining, vision testing and correcting
  5. Spectacles and eyeglasses
  6. Folding

James W. Fitzgerald

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Underwater electroacoustic transducers

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent

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Visual examination apparatus

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

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Profile ID: LFUS-PAI-P-1746272

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