Patents by Inventor Kiyoshige Muramatsu

Kiyoshige Muramatsu 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).

  • Branching filter and communication apparatus
    Patent number: 6756864
    Abstract: A branching filter includes a receiving surface acoustic wave filter and a transmitting surface acoustic wave filter, which are provided on a multilayer ceramic substrate. The branching filter further includes at least one matching element and a low pass filter, which are provided within the multilayer ceramic substrate. The matching element is connected to the receiving surface acoustic wave filter and the low pass filter is connected to the transmitting surface acoustic wave filter. The ground of the low pass filter is separated within the multilayer ceramic substrate from the grounds of the other circuit.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: June 29, 2004
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Kiyoshige Muramatsu
  • Branching filter and communication apparatus
    Publication number: 20030090338
    Abstract: A branching filter includes a receiving surface acoustic wave filter and a transmitting surface acoustic wave filter, which are provided on a multilayer ceramic substrate. The branching filter further includes at least one matching element and a low pass filter, which are provided within the multilayer ceramic substrate. The matching element is connected to the receiving surface acoustic wave filter and the low pass filter is connected to the transmitting surface acoustic wave filter. The ground of the low pass filter is separated within the multilayer ceramic substrate from the grounds of the other circuit.
    Type: Application
    Filed: October 18, 2002
    Publication date: May 15, 2003
    Inventor: Kiyoshige Muramatsu