Patents by Inventor Asaki Suzaki

Asaki Suzaki 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).

  • Presbyopia correction contact lens
    Patent number: 6199982
    Abstract: Presbyopia correction contact lens including an optical zone consisting of a substantially circular central optical portion and an annular peripheral optical portion outside the central optical portion, the central and peripheral optical portions having respective different optical power values, so that the central and peripheral optical portions provide one and the other of a near vision correction region and a distant vision correction region, respectively, wherein the central and peripheral optical portions provide the near and distant vision correction regions, respectively, and the optical zone includes a front surface having an arcuate configuration with a substantially constant curvature in cross section taken in a plane parallel to a diametric direction of the contact lens, and a back surface consisting of a central portion corresponding to the central optical portion and a peripheral portion corresponding to the peripheral optical portion, the central portion of the back surface having an arcuate con
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: March 13, 2001
    Assignee: Menicon Co., Ltd.
    Inventors: Hiroyuki Oyama, Tadashi Sawano, Kazuya Miyamura, Asaki Suzaki