Patents by Inventor John N. Mangat-Rai

John N. Mangat-Rai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4634243
    Abstract: The present invention psychophysically detects earliest signs of loss of vision due to nerve loss in glaucoma and ocular hypertension. An instrument employs a dynamic random dot background field and a movable target that consists of a circular area in which the dots are spatially and temporally coherent. Thus, visual fields will be based on pattern discrimination rather than on conventional measures of luminance discrimination.
    Type: Grant
    Filed: December 26, 1984
    Date of Patent: January 6, 1987
    Assignees: LKC Systems, Inc., Vision Research Associates, Inc.
    Inventors: Robert W. Massof, John N. Mangat-Rai