Patents by Inventor Yasuhisa Katayama

Yasuhisa Katayama 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).

  • Laminated device
    Patent number: 8004381
    Abstract: A laminated device comprising pluralities of magnetic ferrite layers, conductor patterns each formed on each magnetic ferrite layer and connected in a lamination direction to form a coil, and a non-magnetic ceramic layer formed on at least one magnetic ferrite layer such that it overlaps the conductor patterns in a lamination direction, the non-magnetic ceramic layer comprising as main components non-magnetic ceramics having higher sintering temperatures than that of the magnetic ferrite, and further one or more of Cu, Zn and Bi in the form of an oxide.
    Type: Grant
    Filed: July 5, 2007
    Date of Patent: August 23, 2011
    Assignee: Hitachi Metals, Ltd.
    Inventors: Yasuhisa Katayama, Tohru Umeno, Takeshi Tachibana
  • LAMINATED DEVICE
    Publication number: 20100033286
    Abstract: A laminated device comprising pluralities of magnetic ferrite layers, conductor patterns each formed on each magnetic ferrite layer and connected in a lamination direction to form a coil, and a non-magnetic ceramic layer formed on at least one magnetic ferrite layer such that it overlaps the conductor patterns in a lamination direction, the non-magnetic ceramic layer comprising as main components non-magnetic ceramics having higher sintering temperatures than that of the magnetic ferrite, and further one or more of Cu, Zn and Bi in the form of an oxide.
    Type: Application
    Filed: July 5, 2007
    Publication date: February 11, 2010
    Applicant: Hitachi Metals, Ltd
    Inventors: Yasuhisa Katayama, Tohru Umeno, Takeshi Tachibana