Patents by Inventor Tsutomu Yashiro

Tsutomu Yashiro 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).

  • Deflection yoke and yoke core used for the deflection yoke
    Patent number: 6046538
    Abstract: The present invention provides a deflection yoke for deflecting an electron beam emitted from an electron gun of a CRT (cathode ray tube). The deflection yoke is mounted on the CRT at a position between a neck tube having a small diameter section and a funnel having a large diameter section of the CRT. The deflection yoke comprises a horizontal deflection coil for deflecting the electron beam in a horizontal direction in the CRT, a vertical deflection coil for deflecting the electron beam in a vertical direction in the CRT, and a yoke core having a cone shape with a large diameter part at one end thereof in a side of the funnel and a small diameter part at another end thereof in a side of the neck tube to allow the yoke core to cover the horizontal and vertical deflection coils. The yoke core is made of a molded magnetic material cured by heating.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: April 4, 2000
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Hideo Hishiki, Tsutomu Yashiro, Takao Watanabe
  • Magnetic recording medium and binder for use with magnetic coating in the magnetic recording medium
    Patent number: 5935703
    Abstract: A magnetic recording medium has a substrate and a magnetic layer formed on the substrate. The magnetic layer includes magnetic powder and a binder for binding the magnetic powder on the substrate. The binder includes at least a resin component containing at least an aminoquinone structure selected from an aminoquinone structure group shown with formulas (1-1a), (1-1b), (1-3a) and (1-3b) as a constitutional unit and at least a polar group selected from a group shown with a formula (1-2) in a composition of the resin component. Thus, the magnetic recording medium has excellent corrosion resistance of the magnetic powder and excellent conservation and running durability.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: August 10, 1999
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Takayuki Deno, Tsutomu Yashiro, Ikuo Matsumoto, Osamu Kobayashi, Noboru Watanabe, Masaru Hanayama, Takumu Tada, Toshimitsu Saitou
  • Thermal transfer sheet comprising an improved ink layer
    Patent number: 4946826
    Abstract: A thermal transfer sheet is provided which comprises a support and an ink layer formed on one side of the support. The ink layer is made of a composition of a sublimable dye and a resin binder comprised of not less than 15 parts by weight of an epoxy resin and not less than 30 parts by weight of a butyral resin. The resin binder is effective in suppressing soiling on a sheet to be transferred as will be caused by the dye additionally deposited on the background of the thermal transfer sheet during the thermal printing procedure.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: August 7, 1990
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Naoyuki Kubo, Kiyoshi Senzaki, Yuji Kikuchi, Tsutomu Yashiro
  • Magnetic recording medium
    Patent number: 4699840
    Abstract: A magnetic recording medium has a magnetic layer which is made of a magnetic material constituted by a mixture of hexagonal system ferrite magnetic particles and acicular ferromagnetic particles.
    Type: Grant
    Filed: September 27, 1985
    Date of Patent: October 13, 1987
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Tsutomu Yashiro, Mutsumu Kurihara, Hiroshi Togashi