Patents by Inventor Malcolm G. Townsley

Malcolm G. Townsley 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: 4549794
    Abstract: Hydrophilic bifocal corneal contact lenses of the alternating-vision type having a critical set of dimensions for the various elements which results in a surprising increase in the success rate of persons wearing these improved lenses.
    Type: Grant
    Filed: May 5, 1983
    Date of Patent: October 29, 1985
    Assignee: Schering Corporation
    Inventors: Samuel Loshaek, Malcolm G. Townsley
  • Patent number: 3937566
    Abstract: A process for prescribing and manufacturing contact lenses wherein a first concave curvature is developed on the interior face of the lens in the central optical zone. This concave curvature conforms to a portion of a sphere having a radius equal to the radius of a base curve determined to be suitable for the particular patient. A second concave curvature is developed on the interior face of the lens to provide a bearing zone in surrounding relationship relative to the optical zone. The second curvature conforms to an annulus of a sphere having a radius determined by the slope of the patient's eye at points of contact of the second curvature with the eye. The slope is determined by calculating the eccentricity of the ellipsoidal surface which most closely describes the shape of the patient's eye.
    Type: Grant
    Filed: February 27, 1974
    Date of Patent: February 10, 1976
    Assignee: Wesley-Jessen Inc.
    Inventor: Malcolm G. Townsley