Patents by Inventor Hirosi Nakajo

Hirosi Nakajo 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).

  • Dielectric ceramics for high frequency
    Patent number: 5002913
    Abstract: A dielectric ceramics for high frequencies having its dielectric constant of as high as 80 and a sufficiently high Q value (1/dielectric loss) of 1,000 or above, even in a micro-wave region, which is a compound having a structure of Sr.sub.3 Ti.sub.2 O.sub.7, and being represented by the following general formula: Sr.sub.3(1-x) Ca.sub.3x Ti.sub.2 O.sub.7 (where: 0.1<x.ltoreq.0.55).
    Type: Grant
    Filed: December 20, 1989
    Date of Patent: March 26, 1991
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Akira Yamada, Susumu Kawamata, Hirosi Nakajo, Hisao Watarai