Patents by Inventor Edward Z. Zdrok

Edward Z. Zdrok 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).

  • Method for marking intraocular lenses
    Patent number: 4039827
    Abstract: Nondestructive marking of plastic artificial intraocular lenses for coding purposes. Exposure with ultraviolet radiation of portions of a lens surface forming boundaries of desired coding characters or similar exposure only of areas forming the characters themselves produces a differential in refractive index of the material of the lens wherewith detection and reading of the coding may be accomplished before and/or after intraocular implantation.
    Type: Grant
    Filed: August 26, 1976
    Date of Patent: August 2, 1977
    Assignee: American Optical Corporation
    Inventors: Edward Z. Zdrok, Emil W. Deeg