Patents by Inventor Mikio Hitaka

Mikio Hitaka 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 porcelain composition
    Patent number: 4775649
    Abstract: A dielectric resonator to be advantageously used in 0.5-6 GHz band and having a large unloaded Q value, and adequate relative dielectric constant, a good stability of .tau..sub.f and a superior linearity of temperature characteristic of the resonance frequency, may be constituted by the dielectric porcelain composition expressed by the formula:Ba.sub.x Sr.sub.y Ca.sub.z (Zn.sub.1/3 Nb.sub.2/3).sub.1-t Ti.sub.t O.sub.3in which x+y+z=1, x is within the range of 0 to 0.5, y is within the range of 0.5 to 0.999, z is within the range of 0.001 to 0.20 and t is within the range of 0.001 to 0.25.
    Type: Grant
    Filed: July 22, 1986
    Date of Patent: October 4, 1988
    Assignee: Ube Industries, Ltd.
    Inventors: Ryozo Kitoh, Mikio Hitaka, Tetsuya Fujimoto