Patents by Inventor Kiyomi Ito

Kiyomi Ito 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: 5985409
    Abstract: A cleaning tape having a cleaning effect for a magnetic head and an excellent picture quality and enabling the head cleaning state to be comprehended more reliably. The cleaning tape 1 includes a non-magnetic substrate 2 on which a magnetic paint mainly composed of magnetic powders and a binder is coated to form a magnetic layer 3. The Young's modulus in the longitudinal direction is 6000 to 10000 N/mm.sup.2, the residual magnetic flux density (Br) of the uppermost layer of the magnetic layer is not lower than 200 mT, the coercivity of the uppermost layer of the magnetic layer 3 is not lower than 127 kA/m and the centerline mean roughness of the surface of the magnetic layer (Ra) is 8 to 16 nm. The magnetic powders of the cleaning tape 1 are Fe--Co based alloy powders having a mean long-axis length of 0.06 to 0.20 .mu.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: November 16, 1999
    Assignee: Sony Corporation
    Inventors: Takahiro Miyazaki, Reiko Watanabe, Kiyomi Ito