Patents by Inventor Yoshiko Uematsu

Yoshiko Uematsu 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).

  • Optical recording medium
    Patent number: 5019476
    Abstract: An optical recording medium such as an optical disk, which is capable of reversibly repeating a recording/erasing cycle. This optical recording medium comprises a transparent substrate and recording layer formed on the substrate. This recording layer comprise a liquid crystalline high polymer having side chains and a dyestuff having a recording-light absorbing property. The side chain may preferably comprises mesogen group, a monocyclic or polycyclic compound such as phenyl, benzyl, naphthyl or anthryl group, and alkyl or aryl group having 1 to 18 carbon atoms.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: May 28, 1991
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Toshiyuki Kanno, Naoyuki Ueno, Seiji Kondo, Yasuji Nagata, Jun Kanehira, Hideshi Takahashi, Yoshiko Uematsu