Patents by Inventor Masaru Mamiya

Masaru Mamiya 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).

  • Indicator device and illumination device
    Patent number: 6517213
    Abstract: An indicator device is intended to make an indication by illuminating a predetermined indicating surface, and comprises a light source (12) for emitting a light (L1) of the first wavelength and a fluorescent plate (22) disposed between the light source and the indicating surface for changing at least part of the light of the first wavelength projected from the light source into a light (L2) of the second wavelength longer than the first wavelength and projecting it towards the indicating surface.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: February 11, 2003
    Assignee: IDEC Izumi Corporation
    Inventors: Toshihiro Fujita, Akito Okamoto, Masaru Mamiya, Ikkan Nishihara, Shinichi Tanabe