Patents by Inventor Hiroshi Takakura

Hiroshi Takakura 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).

  • Heater for indirectly-heated cathode
    Patent number: 4886995
    Abstract: The improved structure of a heater for an indirectly-heated cathode which is used for CRTs or the like is disclosed. A core wire for a heater is wound around a mandrel into a primary winding so that the inner diameter of the primary winding is 4.3 to 6.0 times the diameter of the core wire. The primary winding may be further wound into a secondary winding.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: December 12, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Takakura, Sachio Koizumi