Patents by Inventor Katsuo Muraki

Katsuo Muraki 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).

  • Light emitting diode array
    Patent number: 4630180
    Abstract: A plurality of light emitting diode pellets arranged on a base are surrounded by a partition member and an outer frame member fixed on the base to mount an elongated lens on the opening portion thereof. A certain number of partition members are arranged between the base and the lens having recessed portions so as to partition each pellet or groups of several pellets. The upper ends of the partition members are inserted into recessed portions of the lens. Thus, when an arbitrary light emitting diode pellet is energized, light from the energized pellet does not spread to the non-light emitting pellet portions, thus clearly discriminating between the light emitting portions and non-light emitting portions.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: December 16, 1986
    Assignees: Kabushiki Kaisha Toshiba, Harison Electric Company Limited
    Inventors: Katsuo Muraki, Kiyokazu Honda, Takaki Watanabe
  • 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