Patents by Inventor Nancy Davenport, executrix

Nancy Davenport, executrix 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: 4418992
    Abstract: An improved ophthalmic lens and method of making same, said lens being formed of refractive material having two refractive surfaces one of which is divided into first and second viewing zones intended respectively for distant vision and near vision. The first viewing zone of the lens occupies substantially the upper half of said one surface and may be spherical or it may be an aspheric surface of revolution. The second zone of the lens occupies the lower portion of said one surface and is uniquely configured to markedly reduce blur and distortion. The method of the invention provides a novel and superior technique for smoothly connecting the surface between the distance and near viewing portions of the lens. The lens produced by the method is unique in that blur and distortion in the portion of the lens predominently used by the wearer is substantially eliminated.
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: December 6, 1983
    Assignee: Younger Manufacturing Company
    Inventors: Lawrence J. Davenport, deceased, Nancy Davenport, executrix