Patents by Inventor Norihiro Okawa

Norihiro Okawa 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).

  • MAGNETIC HEAD HAVING A MULTILAYER MAGNETIC FILM AND METHOD FOR PRODUCING THE SAME
    Publication number: 20110116184
    Abstract: According to one embodiment, a method for producing a magnetic head includes depositing a first film above a substrate, etching a pattern into the first film, depositing a second film on the etched portion of the first film, and depositing a third film above the first and second film to form a multilayer magnetic film, wherein the second film is embedded between the first and third film in a portion of the first film that is removed. In another embodiment, a differential magnetic read head includes a magnetic multilayer film comprising a stack of a first magnetic sensor film and a second magnetic sensor film which are not magnetically connected and a hard magnetic film provided on both sides in a track width direction of the magnetic multilayer film for controlling a magnetic domain of the magnetic multilayer film. The hard magnetic film is a laminated structure as described above.
    Type: Application
    Filed: November 8, 2010
    Publication date: May 19, 2011
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Kan Yasui, Nobuo Yoshida, Katsuro Watanabe, Norihiro Okawa
  • Personal digital assistant
    Patent number: D481719
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: November 4, 2003
    Assignees: NEC Infrontia Corporation, Tatung Company
    Inventors: Norihiro Okawa, Hideki Nishimura