Patents by Inventor Kinji Sasaki

Kinji Sasaki 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).

  • Magnetic recording medium and process for its production
    Patent number: 4650713
    Abstract: A magnetic recording medium having a magnetic layer comprising ferromagnetic powder particles dispersed in a binder, wherein the ferromagnetic powder particles satisfy the condition represented by T<600.times.10.sup.3 nm.sup.3 where T is an average value of volume T.sub.1 of each particle, where T.sub.1 is represented by T.sub.1 =L(nm).times.W(nm).times.W(nm) where L is the length of each particle and W is the width thereof, and the skewness in the distribution of the length L is at most 0.4.
    Type: Grant
    Filed: January 11, 1985
    Date of Patent: March 17, 1987
    Assignee: TDK Corporation
    Inventors: Hiroshi Ohta, Kinji Sasaki
  • Magnetic recording medium and process for producing same
    Patent number: 4582759
    Abstract: A magnetic recording medium having a magnetic layer which is formed by dispersing a magnetic powder and further an abrasive when necessary into a binder containing a sugar alcohol. The magnetic recording medium has excellent glossiness, squareness ratio and other surface properties due to the improvement of dispersibility of the magnetic powder and/or an abrasive when necessary.
    Type: Grant
    Filed: November 1, 1984
    Date of Patent: April 15, 1986
    Assignee: TDK Corporation
    Inventors: Hiroshi Ota, Kinji Sasaki
  • Magnetic recording medium
    Patent number: 4423452
    Abstract: A magnetic recording medium comprises a substrate coated with a magnetic layer comprising a magnetic powder and a fine titanium oxide powder having a particle diameter of at least 0.4.mu. and at least one other fine hard non-magnetic powder.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: December 27, 1983
    Assignee: TDK Electronics Co., Ltd.
    Inventors: Norifumi Kajimoto, Yoshio Kawakami, Kinji Sasaki
  • Magnetic recording medium
    Patent number: 4420408
    Abstract: A magnetic recording medium comprises a combination of two or more kinds of fine abrasive powders having different true specific gravities in a magnetic layer containing a magnetic powder.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: December 13, 1983
    Assignee: TDK Electronics Co., Ltd.
    Inventors: Norifumi Kajimoto, Kinji Sasaki