Display screen and vision tester apparatus

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United States of America Patent

PATENT NO 6454412
SERIAL NO

09585725

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The present invention relates to an improved display screen for a vision tester apparatus for use in optometric examinations to simulate the actual alphanumeric and graphical images of a modern, high-resolution video display terminal (VDT) and to facilitate prescribing corrective lenses that will perform well for a patient using an actual VDT. The display screen uses graphical images and alphanumeric characters of a continuous-line style to simulate more accurately the display on an modern, high-resolution VDT.

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Patent Owner(s)

Patent OwnerAddress
ESSILOR INTERNATIONAL S A147 RUE DE PARIS 94227 CHARENTON CEDEX

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Torrey, Jonathan G Portland, OR 10 104

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