Patents by Inventor Katuhiko Gunzi

Katuhiko Gunzi 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).

  • Microwave filter
    Patent number: 4768003
    Abstract: A microwave filter comprising a rectangular ceramics block (30) having a plurality of elongated parallel holes (31-36) extending from the top surface to the bottom surface thereof. The holes are plated with conductive layers (37, 38), and flat conductive areas (39-44) coupled with the layers (37, 38) spatially disposed on the top surface of the dielectric block (30) surround opening ends of the holes (31-36). An input terminal and an output terminal are provided adjacent to the conductive areas (39, 44) at both the extreme sides of the dielectric block (30).
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: August 30, 1988
    Assignee: OKI Electric Industry Co., Inc.
    Inventors: Izumi Kawakami, Tomokazu Komazaki, Katuhiko Gunzi, Norio Onisi