Patents by Inventor Tooru Matuda

Tooru Matuda 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).

  • Thin-film magnetic head having substrate formed of crystallized glass
    Patent number: 5057959
    Abstract: A thin-film magnetic head having a magnetic core formed by a thin-film deposition technique on a substrate formed of crystallized glass which comprises of a mass of microcrystalline aggregation particles having an average particle size of 1 to 10 .mu.m and each comprising of an aggregation of microcrystalline grains having an average grain size of about 0.5 .mu.m or smaller. This structure enables an improvement in the abrasion resistance of the head and, hence, an improvement in the recording/reproduction characteristics while maintaining the desired workability of the substrate, thereby improving the head in producibility and reliability.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: October 15, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinichi Inoue, Kenji Makino, Tooru Matuda, Fujihiro Itoh, Yutaka Kusano