Patents by Inventor FueGerhard

FueGerhard 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).

  • Multi-focal spectacle lens with a dioptric power varying progressively between different zones of vision
    Patent number: 4606622
    Abstract: The invention contemplates a multi-focal spectacle lens with a dioptric power varying progressively between different zones of vision, namely, a progressive lens which, with a short progressive zone, substantially satisfies in the progressive zone as well as in the far-vision and near-vision zones all requirements (monocular and binocular) for sharpness and compatibility, while reducing horizontal and vertical directional errors to tolerable values by selecting distortion on both sides of the principal sight line accordingly.
    Type: Grant
    Filed: January 13, 1984
    Date of Patent: August 19, 1986
    Assignee: Carl-Zeiss-Stiftung, Heidenheim/Brenz
    Inventors: FueGerhard, Hans Lahres