Patents by Inventor Michiko Takushima (nee Harumoto)

Michiko Takushima (nee Harumoto) 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 for determining an aging condition for an optical waveguide grating and temperature sensor
    Patent number: 6292607
    Abstract: The present invention provides a method for determining a condition of aging for an optical waveguide grating. In this method, the aged deterioration curve of the optical waveguide grating is set as a form of C·t−&agr;, where t represents time, and &agr; and C represent parameters. Then, the condition of the aging is determined based on the aged deterioration curve.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: September 18, 2001
    Assignee: Sumitomo Electric Industries
    Inventors: Shinji Ishikawa, Toru Iwashima, Michiko Takushima (nee Harumoto), Akira Inoue, Masakazu Shigehara