Patents by Inventor Kenichi Mituhashi

Kenichi Mituhashi 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).

  • Sealing body having a shielding layer for hermetically sealing a tube lamp
    Patent number: 6271627
    Abstract: A sealing body (5) of a tube lamp using a functional gradient material in which proceeding from electrically conductive areas into the vicinity of welds on one side tube (2) and in outer leads (6) oxidation is suppressed, and in which the service life of the tube lamp is prolonged. The sealing body (5) of a tube lamp consist of a functional gradient material which is formed by mixing of a dielectric material and an electrically conductive material, the mixing ratios in the longitudinal direction being different continuously or incrementally, and in which one end forms a dielectric area and the other end forms an electrically conductive area, and by at least one part of the external surface of this electrically conductive area and/or at least one part of outer lead (6) projecting from sealing body (5) being jacketed with an atmosphere shielding layer (7).
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: August 7, 2001
    Assignees: Ushiodenki Kabushiki Kaisha, Toto Ltd.
    Inventors: Yukihiro Morimoto, Kazuyuki Mori, Kenichi Mituhashi, Shoji Miyanaga