Patents by Inventor Toshikazu Miura

Toshikazu Miura 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 of producing ocular lens and holders for holding lens blank during cutting thereof
    Patent number: 6224467
    Abstract: A method of producing an ocular lens, comprising the steps of: (a) preparing a lens blank which gives an ocular lens, the lens blank having a concave back surface and a convex front surface, at least a portion of the front surface being tapered to give a tapered surface; (b) forming a back curved surface of the ocular lens by effecting a cutting operation on the concave back surface of the lens blank, while the lens blank is supported on a spindle of a back surface cutting device such that the tapered surface of the lens blank is drawn onto a tapered holding surface of the spindle under a negative pressure applied to the lens blank, the tapered holding surface following a profile of the tapered surface of the lens blank; and (c) forming a front curved surface of the ocular lens by effecting a cutting operation on the front surface of the lens blank whose back surface has been cut to form the back curved surface, while the lens blank is supported on a spindle of a front surface cutting device such that the bac
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: May 1, 2001
    Assignee: Menicon Co., Ltd.
    Inventors: Yuki Tanaka, Yasuyoshi Yamamoto, Masahiro Sasaki, Toshikazu Miura, Seiichi Ichikawa, Hiroyuki Tajima
  • Contact lens case
    Patent number: D813537
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: March 27, 2018
    Assignee: MENICON CO., LTD.
    Inventors: Toshikazu Miura, Shota Nagao, Takashi Goto, Katsuhiro Iwai, Keisuke Yamamoto