Patents by Inventor Hans S. Schaffner

Hans S. Schaffner 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).

  • Cutting device and method for the precision trimming of the edge of a cast lens
    Patent number: 4647261
    Abstract: A cutting device and method for the precision trimming of a selected portion of the peripheral edge of a cast lens secured on the external surface of a male mold independent of any eccentricity that may exist between the opening defined in the mold and the outer diameter of the mold.
    Type: Grant
    Filed: September 19, 1983
    Date of Patent: March 3, 1987
    Assignee: International Hydron Corporation
    Inventor: Hans S. Schaffner