4. Optical: systems and elements
  5. Lens
  6. With support

John J. Sprenger

Inventor

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Artificial human eye and test apparatus

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Eye exercising or training type
Reexamination Certificate

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Variable focus adapter

Optical: systems and elements – Lens – With support
Patent

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Profile ID: LFUS-PAI-P-774504

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