Patents by Inventor Reiko Tazawa

Reiko Tazawa 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 with pattern and fabrication method thereof
    Patent number: 6735166
    Abstract: On a data recording region, an aluminum reflective film is formed together with a reflective film forming a pattern on an outer circumferential side of the data recording region. Although aluminum identical to the material of the reflective film on the data recording region can be employed for the reflective film on the outer circumferential region, gold, titanium and the like can also be used. Therefore, an optical disk that has a unique pattern formed at an outer circumferential region that was not conventionally used can be fabricated at a low cost.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: May 11, 2004
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Takanari Kusafuka, Reiko Tazawa, Kenji Kiyota, Mitsuhiro Ohtani