Patents by Inventor Lars Frisén

Lars Frisén 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).

  • Device and method for vision test
    Patent number: 8061839
    Abstract: A device for vision testing comprises a viewing position (6) and an image surface (5). The distance between the viewing position (6) and the image surface (5) is enclosed. The relation between the resolution of the image surface and the distance between the viewing position (6) and the image surface (5) is such that the angle of a point on the image surface (5) is less than or equal to 1 minute of arc seen from the viewing position (6).
    Type: Grant
    Filed: June 16, 2007
    Date of Patent: November 22, 2011
    Assignee: Visumetrics AB
    Inventor: Lars Frisén
  • Device and method for vision test
    Publication number: 20090153803
    Abstract: A device for vision testing comprises a viewing position (6) and an image surface (5). The distance between the viewing position (6) and the image surface (5) is enclosed. The relation between the resolution of the image surface and the distance between the viewing position (6) and the image surface (5) is such that the angle of a point on the image surface (5) is less than or equal to 1 minute of arc seen from the viewing position (6).
    Type: Application
    Filed: June 16, 2007
    Publication date: June 18, 2009
    Inventor: Lars Frisén