Patents by Inventor Ken-ichi Shiroki

Ken-ichi Shiroki 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).

  • Solid state laser device with light filter
    Patent number: 4039970
    Abstract: A laser device includes a solid state laser element consisting of a yttrium aluminate crystal and a source of pumping light. A light filter which intercepts and removes pumping light components having wave-lengths below about 5,000A is disposed between the laser element and the light source. The removal of these selected higher frequency components lowers the oscillation threshold value and increases the laser output.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: August 2, 1977
    Assignee: Nippon Electric Company, Ltd.
    Inventors: Ken-ichi Shiroki, Katsumi Mori, Yasuhiko Kuwano, Seiichi Saito