Patents by Inventor Katsuhisa Kakizaki

Katsuhisa Kakizaki 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 carrier powder having a wide chargeable range of electric resistance useful for magnetic brush development
    Patent number: 4485162
    Abstract: A magnetic carrier powder composed essentially of particles of a ferrite having a composition represented by the formula(MO).sub.100-x (Fe.sub.2 O.sub.3).sub.xwhere M is Mg, Mn, Zn, Ni, a combination of Mg in an atomic ratio of at least 0.05 with at least one metal selected from the group consisting of Zn, Cu, Mn and Co, a combination of Mn in an atomic ratio of at least 0.05 with at least one metal selected from the group consisting of Zn, Cu, Mg and Co, or a combination of Ni in an atomic ratio of at least 0.05 with at least one metal selected from the group consisting of Zn, Mg, Mn, Cu and Co, and x is greater than 53 molar %.
    Type: Grant
    Filed: February 8, 1983
    Date of Patent: November 27, 1984
    Assignee: TDK Electronics Co., Ltd.
    Inventors: Kenji Imamura, Hiroshi Saitoh, Katsuhisa Kakizaki, Motohiko Makino