4. Optics: measuring and testing
  5. Photometers
  6. Modulating

John Thomas Landrum

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Flicker photometer

Optics: measuring and testing – Photometers – Modulating
Patent

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Flicker photometer

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

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Macular pigment measurements

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

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Profile ID: LFUS-PAI-P-1254475

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