Patents by Inventor Kimikazu Itoh

Kimikazu Itoh 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).

  • Touch panel for detecting a coordinate of an arbitrary position where pressure is applied
    Patent number: 5451724
    Abstract: A touch panel to detect a coordinate of an arbitrary position where pressure is applied. The touch panel includes a substrate, a resistor layer provided on the substrate, a spacer layer made of an insulator material, a conductor layer confronting the resistor layer via the spacer layer, a plurality of point electrodes provided on the resistor layer at a peripheral part of the resistor layer along each side of the resistor layer, and a plurality of switching elements provided above the substrate and electrically coupled to the point electrodes for supplying a voltage to the point electrodes. The spacer layer is made up of a plurality of spacer pieces which are arranged so that an electrical contact is made between the conductor layer and the resistor layer when a pressure is applied at an arbitrary position on the conductor layer.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: September 19, 1995
    Assignee: Fujitsu Limited
    Inventors: Fumihiko Nakazawa, Masao Shibayama, Tatsumi Ohtsuka, Katsuya Irie, Kimikazu Itoh, Mituyoshi Seino, Toshiaki Tanaka, Akihiko Sakaguchi, Genichi Matsuda