Patents by Inventor Hirochika Shiohama

Hirochika Shiohama 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).

  • High-pressure discharge lamp and lighting method
    Patent number: 5276385
    Abstract: The invention provides a high-pressure discharge lamp incorporating an outer envelope storing a pair of electric terminals a plurality of arc tubes which are respectively stored in this outer envelope and electrically connected in parallel, and a plurality of ignition aids available for assisting operating of these arc tubes, where these ignition aids are provided for each of these arc tubes and contain potentials different from each other. In addition, the invention also provides a lighting system for operating the high-pressure discharge lamp.
    Type: Grant
    Filed: September 25, 1991
    Date of Patent: January 4, 1994
    Assignee: Toshiba Lighting & Technology Corporation
    Inventors: Akira Itoh, Kazuyoshi Okamura, Kazuiki Uchida, Mitsuho Kotabe, Hirochika Shiohama, Kimihito Sato, Yasuki Mori, Katsusuke Uchino