Patents by Inventor Reiko Shigenari

Reiko Shigenari 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).

  • Polymeric piezoelectric key actuated device
    Patent number: 3940637
    Abstract: A key input device which forms a key switch with high reliability or an integrated keyboard with small dimensions which can produce coded signals with high reliability and a S/N ratio of high value without any encoder circuits, comprising a piezoelectric polymer film, applied as a pressure sensor, having layer electrodes on both surfaces thereof and at least one device for straining the film, the straining device defining a key.
    Type: Grant
    Filed: April 24, 1974
    Date of Patent: February 24, 1976
    Assignee: Toray Industries, Inc.
    Inventors: Hiroji Ohigashi, Reiko Shigenari, Syozo Ogawa, Nobuo Sekine