Patents by Inventor Noriyuki Totsuka

Noriyuki Totsuka 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).

  • Indicating plate for watches
    Patent number: 6466522
    Abstract: An indicating plate for a solar watch, comprising a color diffusion plate which, by virtue of the presence of a coloring agent, a coloring light diffusing agent, a colored translucent substrate, a pattern layer/colored thin film layer and a diffusion layer, is adapted to transmit a portion of light having a wavelength within a range capable of causing a solar cell housed under the indicating plate to generate power. The color diffusion plate is adapted to make it difficult to view the solar cell from the outside through the indicating plate and is also adapted to impart a color tone to the indicating plate.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: October 15, 2002
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Hideki Yoshioka, Katsuyuki Yamaguchi, Nobuo Ito, Yoshio Katsuki, Noriyuki Totsuka