Patents by Inventor Ken Masaki

Ken Masaki 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).

  • Patent number: 5905612
    Abstract: A magnetic head can be made by a first step of butting projection end faces of a pair of magnetic cores, each of which is previously machined into a convex shape, through a magnetic gap member; a second step of forming notches which reach a winding groove, at the butted projection end faces of the magnetic cores by an electric discharge machining process, thereby regulating a track width; and a third step of filling, under heat treatment, glass into grooves at two sides of the pair of convex magnetic cores and the notches. When the magnetic head is used, a magnetic recording/reproduction apparatus which is suitable for high density recording such as a digital VTR is provided.
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: May 18, 1999
    Assignee: Matsushita Electric Industrial Co. Ltd.
    Inventors: Yoshiyasu Honma, Ken Masaki, Ken Takahashi
  • Patent number: 5761789
    Abstract: A method of making a magnetic head comprising: a first step of butting projection end faces of a pair of magnetic cores each of which is previously machined into a convex shape, through a magnetic gap member; a second step of forming notches which reach a winding groove, at said butted projection end faces of said magnetic cores by an electric discharge machining process, thereby regulating a track width; and a third step of filling under heat treatment glass into grooves at two sides of said pair of convex magnetic cores and said notches. When the magnetic head is used, a magnetic recording/reproduction apparatus which is suitable for high density recording such as a digital VTR is provided.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: June 9, 1998
    Assignee: Matsushita Electric Industrial Co. Ltd
    Inventors: Yoshiyasu Honma, Ken Masaki, Ken Takahashi