Patents by Inventor Naoki Akiba

Naoki Akiba 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).

  • Filter circuit and transmitter and receiver using the same
    Patent number: 7012479
    Abstract: A filter circuit filters unnecessary frequency components within a signal. The filter circuit includes a first and a second line pattern and a closed loop pattern portion. The first line pattern has two ends and one end thereof is connected to an input terminal and the other is opened or grounded. The second line pattern has two ends and one end thereof is connected to an output terminal and the other being opened or grounded. The closed loop pattern portion, which is interposed between the first and the second line pattern, has two or more closed loop patterns and each of the closed loop patterns has an electromagnetic coupling portion coupled to each of the first and the second line pattern.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: March 14, 2006
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Naoki Akiba, Eiichi Hase, Ryoichi Itou
  • Filter circuit and transmitter and receiver using the same
    Publication number: 20030234700
    Abstract: A filter circuit filters unnecessary frequency components within a signal. The filter circuit includes a first and a second line pattern and a closed loop pattern portion. The first line pattern has two ends and one end thereof is connected to an input terminal and the other is opened or grounded. The second line pattern has two ends and one end thereof is connected to an output terminal and the other being opened or grounded. The closed loop pattern portion, which is interposed between the first and the second line pattern, has two or more closed loop patterns and each of the closed loop patterns has an electromagnetic coupling portion coupled to each of the first and the second line pattern.
    Type: Application
    Filed: June 20, 2003
    Publication date: December 25, 2003
    Applicant: Hitachi Kokusai Electric Inc.
    Inventors: Naoki Akiba, Eiichi Hase, Ryoichi Itou