Patents by Inventor Toshio Yokobari

Toshio Yokobari 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 of developer for electrophotographic copying machines composed of ferrite and a selected metal oxide
    Patent number: 4898801
    Abstract: A carrier of developers composed of a composition represented by (MO).sub.X (Fe.sub.2 O.sub.3) having bulk density of 1.8-3.4 g/Cm.sup.3 and magnetization of 10-30 emu/g in a magnetic field of 450-1000 O (oersted), where M is at least one metal selected from the group comprising lithium, manganese, nickel, zinc, cadmium, copper, cobalt, and magnesium.
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: February 6, 1990
    Assignees: Fuji Xerox Co., Ltd., Nippon Iron Powder Co., Ltd.
    Inventors: Hidekiyo Tachibana, Akihiko Noda, Kazuo Terao, Toshio Honjou, Yukio Seki, Hiroshi Endo, Toshio Yokobari