Patents by Inventor Gou Endou

Gou Endou 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).

  • Surface acoustic wave device with divided interdigital transducers
    Patent number: 6759928
    Abstract: A surface acoustic wave device includes an input interdigital transducer and an output interdigital transducer, disposed on a surface acoustic wave propagation path of a piezoelectric substrate, wherein when an aperture length of an electrode finger of the input or output interdigital transducer is denoted by X, the output or input interdigital transducer has two divided interdigital transducers having the electrode finger in which each aperture length is denoted by substantially X/2, wherein the two divided interdigital transducers are serial-connected, and the electrodes of the respective electrode fingers are led from the two divided interdigital transducers, and are disposed so that two output and input signals connected to a balance terminal pair have a different phase at 180°.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: July 6, 2004
    Assignee: Fujitsu Media Devices Limited
    Inventors: Gou Endou, Osamu Kawachi, Masanori Ueda, Motoyuki Tajima
  • Surface acoustic wave device
    Publication number: 20020079988
    Abstract: A surface acoustic wave device includes an input interdigital transducer and an output interdigital transducer, disposed on a surface acoustic wave propagation path of a piezoelectric substrate, wherein when an aperture length of an electrode finger of the input or output interdigital transducer is denoted by X, the output or input interdigital transducer has two divided interdigital transducers having the electrode finger in which each aperture length is denoted by substantially X/2, wherein the two divided interdigital transducers are serial-connected, and the electrodes of the respective electrode fingers are led from the two divided interdigital transducers, and are disposed so that two output and input signals connected to a balance terminal pair have a different phase at 180°.
    Type: Application
    Filed: February 26, 2002
    Publication date: June 27, 2002
    Applicant: FUJITSU MEDIA DEVICES LIMITED
    Inventors: Gou Endou, Osamu Kawachi, Masanori Ueda, Motoyuki Tajima