Patents by Inventor Hirokazu Uekusa

Hirokazu Uekusa 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).

  • Dual layered magnetic data card with reading and recording apparatus
    Patent number: 5003409
    Abstract: A dual layered magnetic card with an apparatus for reading data therefrom and recording data thereon. The magnetic card includes (a) a card body, (b) a first magnetic layer disposed on the card body, the first magnetic layer including a first magnetic material, (c) a second magnetic layer disposed on the first magnetic layer, the second magnetic layer including a second magnetic material having Curie temperature lower than that of the first magnetic material and a coercive force at an ambient temperature higher than that of the first magnetic material. Also disclosed is an apparatus for reading data on the magnetic card, having a reader, post processor and data eraser, and an apparatus for reading and recording data having a recorder, reader, post processor and a data eraser.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: March 26, 1991
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Ginya Ishiguro, Norio Yano, Hirokazu Uekusa