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

Albert M. Juergens

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Eyewear for hands-free communication

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Combined
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Information system using eyewear for communication

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
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Profile ID: LFUS-PAI-P-2724343

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