Patents by Inventor Keith S. Ames

Keith S. Ames 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).

  • Flexible contact lens for enhanced movement on the eye
    Patent number: 4896958
    Abstract: A flexible contact lens (20) is disclosed as having a central power portion (24), a peripheral flange portion (27), and an externally concave transition portion (26) joining the central portion and the flange portion, whereby the flange portion extends outwardly from the central portion in the manner of a hat brim. The inner edge of the peripheral flange is thereby raised from the eye surface to facilitate movement of the lens over the limbal region of the eye. The extent of the peripheral flange forward from the eye surface promotes eyelid contact to enhance movement of the lens on the eye. In a second embodiment (40), the lens further includes an externally convex transition portion (45) joining the central power portion (44) and the externally concave transition portion (46) to facilitate lens handling.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: January 30, 1990
    Inventors: Keith S. Ames, Steven G. Zantos, Henry A. Knoll