Patents by Inventor Ryoju Takagishi

Ryoju Takagishi 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 disk having first design visible from one side of the disk and a second design visible from the other side of the disk
    Patent number: 5982737
    Abstract: In an optical disk, a display area is formed between the circumference of a recorded area and the circumference of the maximum area to which a recorded area can be provided. A reflective layer is formed covering the recorded area 3 and covering the display area forming a transparent display area at least in part of the display area. And to the transparent display area, a print layer is provided. According to this composition, there is provided the transparent display area without the reflective layer in the optical disk with a recorded area of a small diameter. Therefore, discrimination of the size or diameter of a record area of 12 cm CDs is made easier, and the print layer provided to the transparent display area can be seen from both sides of the optical disk.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: November 9, 1999
    Assignee: Toshiba-Emi Limited
    Inventors: Ryoju Takagishi, Ryouhei Yoshihara