Patents by Inventor Tsuyako Ban

Tsuyako Ban 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).

  • Insulated magnet toner
    Patent number: 4654287
    Abstract: An insulated magnetic toner comprising a binder resin and a powdery magnetic material, said magnetic material being iron or an alloy thereof having a coercive force of not more than 600e.
    Type: Grant
    Filed: November 5, 1984
    Date of Patent: March 31, 1987
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yuji Okuyama, Kenichi Kishi, Kenzi Tuzita, Tsuyako Ban