Patents by Inventor Wen-Chein David Hsiao

Wen-Chein David Hsiao 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 notched pole piece structure
    Patent number: 7489474
    Abstract: A magnetic head includes a first pole piece; a second pole piece; a pedestal formed over a central portion of the first pole piece; a gap separating the pedestal from the second pole piece; and at least one of a top straight walled portion over the pedestal and a bottom straight-walled portion underneath the pedestal, the pedestal being notched with angled side walls.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: February 10, 2009
    Assignee: International Business Machines Corporation
    Inventors: Wen-Chein David Hsiao, Jyh-Shuey Jerry Lo
  • Magnetic head having a notched pole piece structure and method of making the same
    Patent number: 7391591
    Abstract: A magnetic head having an improved fringing field and overwrite capability, and a method of making the same, are described.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: June 24, 2008
    Assignee: International Business Machines Corporation
    Inventors: Wen-Chein David Hsiao, Jyh-Shuey Jerry Lo
  • Magnetic head having a notched pole piece structure and method of making the same
    Patent number: 6947255
    Abstract: A magnetic head having an improved fringing field and overwrite capability, and a method of making the same, are described.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: September 20, 2005
    Assignee: International Business Machines Corporation
    Inventors: Wen-Chein David Hsiao, Jyh-Shuey Jerry Lo
  • Magnetic head having a notched pole piece structure and method of making the same
    Publication number: 20030179498
    Abstract: A magnetic head having an improved fringing field and overwrite capability, and a method of making the same, are described.
    Type: Application
    Filed: March 22, 2002
    Publication date: September 25, 2003
    Inventors: Wen-Chein David Hsiao, Jyh-Shuey Jerry Lo