Patents by Inventor Ronald Pitts Crick

Ronald Pitts Crick 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).

  • Apparatus for detecting visual field defects of the eye
    Patent number: 4421392
    Abstract: A perimeter for testing visual field light-sensitivity presents a moving spot or a set of fixed spots visually to a patient. The spot or spots have ill-defined edges so that the effect of visual acuity is minimized. A hand-held device is proposed whereby mass monitoring, particularly for the effects of glaucoma, is possible.
    Type: Grant
    Filed: September 11, 1979
    Date of Patent: December 20, 1983
    Inventors: Ronald Pitts Crick, Jonathan C. Pitts Crick