Patents by Inventor Minoru Chinju

Minoru Chinju 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).

  • Spherical electrophotographic magnetoplumbite-type hexagonal ferrite carrier powder
    Patent number: 4623603
    Abstract: An electrophotographic ferrite carrier with substantially spherical shape based on a magnetoplumbite structure of hexagonal ferrite or ferroxplana structure derived from the magnetoplumbite structure has a high electrical resistivity and a longer life.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: November 18, 1986
    Assignee: Hitachi Metals, Ltd.
    Inventors: Tsutomu Iimura, Minoru Chinju