Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Albert John Hofeldt0
Date of Patent
December 28, 2010
0Patent Application Number
120125610
Date Filed
February 4, 2008
0Patent Primary Examiner
Patent abstract
A vision testing device for measuring single or multiple visual functions consisting of an internally illuminated hand-held instrument, vision charts, vision correcting and occluding elements, a testing frame for holding combined vision correcting and blocking elements, and modular accessories.
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