Patents by Inventor Naoko Kamogawa

Naoko Kamogawa 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).

  • TUNABLE FILTER, TUNABLE DUPLEXER AND MOBILE COMMUNICATION TERMINAL USING THE SAME
    Publication number: 20120112853
    Abstract: A tunable filter and a tunable duplexer are provided, both of which comprise an input terminal, an output terminal, four fixed capacitors, three variable capacitors and three fixed coils; wherein the variable capacitors are grounded at one end and, at the other end, connected to the fixed coils to form three sets of series-connected LC circuit; wherein the connecting points of the three sets of series-connected LC circuit, the input terminal and the output terminal are connected with the fixed capacitors, respectively.
    Type: Application
    Filed: August 30, 2011
    Publication date: May 10, 2012
    Inventors: Osamu HIKINO, Takashi Shiba, Naoko Kamogawa, Akio Yamamoto, Masazumi Tone