Patents by Inventor Kazutoshi Asada

Kazutoshi Asada 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).

  • Sliding-type magnetic head for magnetooptical recording
    Patent number: 6031693
    Abstract: A magnetic head for recording information on a recording disk which has a head body that has a sliding sole which contacts the recording disk. The head body is supported by a three-piece leaf spring which has one end connected to a support and the other end connected to the head body. The support member includes a stopper which engages the end of the second portion of the leaf spring so as to control the position of the head body.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: February 29, 2000
    Assignee: Sony Corporation
    Inventors: Tomoyuki Takahashi, Kazuhiro Kimura, Tadao Nishii, Kenji Yazawa, Kazutoshi Asada, Hideo Tanaka, Michiaki Takeshi
  • Sliding-type magnetic head for magnetooptical recording
    Patent number: 5943312
    Abstract: A magnetic head for recording information on a recording disk which has a head body that has a sliding sole which contacts the recording disk. The head body is supported by a three-piece leaf spring which has one end connected to a support and the other end connected to the head body. The support member includes a stopper which engages the end of the second portion of the leaf spring so as to control the position of the head body.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: August 24, 1999
    Assignee: Sony Corporation
    Inventors: Tomoyuki Takahashi, Kazuhiro Kimura, Tadao Nishii, Kenji Yazawa, Kazutoshi Asada, Hideo Tanaka, Michiaki Takeshi
  • Sliding-type magnetic head for magnetooptical recording
    Patent number: 5682280
    Abstract: A magnetic head for recording information on a recording disk which has a head body that has a sliding sole which contacts the recording disk. The head body is supported by a three-piece leaf spring which has one end connected to a support and the other end connected to the head body. The support member includes a stopper which engages the end of the second portion of the leaf spring so as to control the position of the head body.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: October 28, 1997
    Assignee: Sony Corporation
    Inventors: Tomoyuki Takahashi, Kazuhiro Kimura, Tadao Nishii, Kenji Yazawa, Kazutoshi Asada, Hideo Tanaka, Michiaki Takeshi
  • Magneto-resistance effect thin-film magnetic head having a laminated flux guide of permalloy and titanium films
    Patent number: 5617276
    Abstract: A magneto-resistance effect thin-film magnetic head with a flux guide for efficiently guiding the signal magnetic flux from the magnetic recording medium to a magneto-resistance effect film. The flux guide is made up of a laminated structure of alternate layers of permalloy and Ti so that the number of the permalloy films is two or more. The flux guide may be formed by an underlying layer and the laminated structure formed on the underlying layer. The film thickness T1 of the permalloy film and the film thickness T2 of the Ti film preferably are such that 0 nm<T1<50 nm and 0 nm<T2<6 nm. The flux guide of the MR head may be formed easily and is excellent in magnetic characteristics. The playback signal output of the MR head may be improved without complicating the production process of the MR head.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 1, 1997
    Assignee: Sony Corporation
    Inventors: Akio Takada, Kazutoshi Asada
  • Sliding-type magnetic head for magnetooptical recording
    Patent number: 5535075
    Abstract: A magnetic head for recording information on a recording disk which has a head body that has a sliding sole which contacts the recording disk. The head body is supported by a three-piece leaf spring which has one end connected to a support and the other end connected to the head body. The support member includes a stopper which engages the end of the second portion of the leaf spring so as to control the position of the head body.
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: July 9, 1996
    Assignee: Sony Corporation
    Inventors: Tomoyuki Takahashi, Kazuhiro Kimura, Tadao Nishii, Kenji Yazawa, Kazutoshi Asada, Hideo Tanaka, Michiaki Takeshi