Patents by Inventor C. Edward Williams

C. Edward Williams 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).

  • Contact lens
    Patent number: 5302978
    Abstract: A contact lens of generally disc-like configuration having a central axis extending through the contact lens and about which the contact lens is substantially symmetric in configuration. The contact lens hasa pupil zone through which the central axis extends and which comprises the area immediately circumferentially surrounding the central axis;an iris zone, which comprises the area circumferentially surrounding the pupil zone; anda peripheral zone which comprises the area circumferentially surrounding the iris zone and extends to the edge of the contact lens.Further in the area immediately adjacent to the periphery of the iris zone and the contact lens and circumferentially extending therearound a band of dark substantially light-absorbing color is provided.
    Type: Grant
    Filed: October 21, 1991
    Date of Patent: April 12, 1994
    Assignee: Pilkington Visioncare, Inc.
    Inventors: John M. Evans, Ashok R. Thakrar, Praful Doshi, C. Edward Williams