Patents by Inventor Hisashi Takagaki

Hisashi Takagaki 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).

  • Band elimination filter and dielectric resonator therefor
    Patent number: 4996506
    Abstract: A band elimination filter which includes at least one or more TM-mode dielectric resonators each including a ceramic casing with an electrically conductive film formed over its inner surface or outer surface, and a dielectric column disposed in a cavity in the ceramic casing, and an electrode provided on the ceramic casing, out of contact with the electrically conductive film, with transmission lines being connected to the electrode.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: February 26, 1991
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Youhei Ishikawa, Toshiro Hiratsuka, Hirotsugu Abe, Hisashi Takagaki, Sadao Yamashita