Patents by Inventor Shigeo Kotake

Shigeo Kotake 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).

  • Polycrystal piezoelectric device and method of producing the same
    Patent number: 5127982
    Abstract: A polycrystal piezoelectric device consists of a plurality of crystals formed by growth of spherulites including a piezoelectric phase consisting of Li.sub.2 B.sub.4 O.sub.7. The orientation of the crystals shifts progressively over about 90 degrees between opposite sides of the device.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: July 7, 1992
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventor: Shigeo Kotake