Patents by Inventor Teruyoshi Kawamata

Teruyoshi Kawamata 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).

  • Tubular incandescent lamp
    Patent number: 4285032
    Abstract: A tubular incandescent lamp which comprises an elongate transparent envelope; and a plurality of small lamps linearly arranged and extending lengthwise through the envelope, each of said small lamps containing a helically coiled filament and wherein the difference between the inner diameter of the envelope and the outer diameter of the respective lamps is chosen to be 2 mm or less.
    Type: Grant
    Filed: July 30, 1979
    Date of Patent: August 18, 1981
    Assignees: Tokyo Shibaura Denki Kabushiki Kaisha, Harison Electric Co., Ltd.
    Inventors: Kiyokazu Honda, Yoshiji Yoshiike, Katsuo Muraki, Teruyoshi Kawamata