Patents by Inventor Jimmy C. Webb

Jimmy C. Webb 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: 5296880
    Abstract: A bifocal contact lens is formed from a material having a uniform index of refraction and includes a concave posterior surface shaped in conformity with a patient's cornea and defining a lens optical axis. The bifocal contact lens includes two separate vision correction surfaces on the anterior side of the lens. A convex distance correction surface has a distance correction radius of curvature with its center of curvature at a point on a line extending parallel to, or coinciding with, the optical axis of the lens. A convex near correction anterior surface has a near correction radius of curvature with its center of curvature at a point also on the line extending parallel to, or coinciding with, the lens optical axis. The junction between the distance correction surface and the near correction surface has an upwardly opening crescent shape and comprises a step or ledge out from the distance correction surface.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: March 22, 1994
    Assignee: Metro Optics of Austin, Inc.
    Inventor: Jimmy C. Webb