Patents by Inventor Fritz Gruna

Fritz Gruna 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 manufacturing an eyeglass lens
    Patent number: 7033024
    Abstract: A method for manufacturing a spectacle lens, in which at first a semi-finished uncut spectacle lens (hereinafter referred to as a blank) is produced, i.e. a spectacle lens having merely one finished optical surface (hereinafter described as base surface); subsequently a prescription-optimized surface is computed according to the data of a spectacle lens prescription; and then the prescription-optimized surface is finished according to the computed data. The invention is characterized by the following method steps: after the production of the semi-finished spectacle lens the base surface is measured; the prescription-optimized surface is computed and finished taking into account not only the individual data of the spectacle prescription, but also the actual shape of the base surface.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: April 25, 2006
    Assignee: Rodenstock GmbH
    Inventors: Roswitha Fendt, Fritz Gruna, Helmut Altheimer, Walter Haimerl, Gregor Esser, Herbert Pfeiffer
  • Method for manufacturing an eyeglass lens
    Publication number: 20040085650
    Abstract: A method for manufacturing a spectacle lens, in which at first a semi-finished uncut spectacle lens (hereinafter referred to as a blank) is produced, i.e. a spectacle lens having merely one finished optical surface (hereinafter described as base surface); subsequently a prescription-optimized surface is computed according to the data of a spectacle lens prescription; and then the prescription-optimized surface is finished according to the computed data. The invention is characterized by the following method steps: after the production of the semi-finished spectacle lens the base surface is measured; the prescription-optimized surface is computed and finished taking into account not only the individual data of the spectacle prescription, but also the actual shape of the base surface.
    Type: Application
    Filed: December 24, 2003
    Publication date: May 6, 2004
    Inventors: Roswitha Fendt, Fritz Gruna, Helmut Altheimer, Walter Haimerl, Gregor Esser, Herbert Pfeiffer