Patents by Inventor Hidehiko Kando

Hidehiko Kando 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 head used in optical information processor
    Patent number: 5044718
    Abstract: An optical head having a plane waveguide for propagating light emitted from a light source, a grating coupler disposed midway of said plane waveguide for converting light emitted from said light source into light which is propagated in said plane waveguide, and a diffraction grating which is different from said grating coupler for diffracting light emitted from said light source before the light is incident to above-mentioned grating coupler.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: September 3, 1991
    Assignee: Hitachi, Ltd.
    Inventor: Hidehiko Kando