Patents by Inventor Hideharu Shima

Hideharu Shima 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).

  • Fluorescent lamp
    Patent number: 4691140
    Abstract: A fluorescent lamp is disclosed which has a glass bulb with a coating layer of phosphor particles on the inner surface, the phosphor particles being covered by a protective layer consisting of a metal oxide. The phosphor particles are not in direct contact with the glass bulb by virture of the protective layer. Thus, it is possible to prevent the reduction of the mechanical strength of the bulb and reduction of the luminuous efficiency of phosphor due to interaction between the glass bulb and phosphor particles.
    Type: Grant
    Filed: July 28, 1986
    Date of Patent: September 1, 1987
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuichi Sakakibara, Yukio Takahashi, Hideharu Shima