Patents by Inventor Yuzo Sawara

Yuzo Sawara 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).

  • Multilayer piezoelectric element
    Patent number: 7518295
    Abstract: A multilayer piezoelectric element has a laminate body in which a plurality of piezoelectric bodies and a plurality of internal electrodes are alternately laminated and sintered. The plurality of internal electrodes comprise a first electrode and a second electrode. The laminate body is provided with a metal oxide layer formed of a material with a melting point higher than a sintering temperature of the piezoelectric bodies. The laminate body has an active portion in which the first electrode and the second electrode are arranged to overlap in a laminate direction of the laminate body, and inactive portions in which the first electrode and the second electrode are arranged not to overlap in the laminate direction of the laminate body. The inactive portions are provided on both sides of the active portion.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: April 14, 2009
    Assignee: TDK Corporation
    Inventors: Kazuo Mochizuki, Kazuo Nagata, Yuzo Sawara
  • Multilayer piezoelectric element
    Publication number: 20080136293
    Abstract: A multilayer piezoelectric element has a laminate body in which a plurality of piezoelectric bodies and a plurality of internal electrodes are alternately laminated and sintered. The plurality of internal electrodes comprise a first electrode and a second electrode. The laminate body is provided with a metal oxide layer formed of a material with a melting point higher than a sintering temperature of the piezoelectric bodies. The laminate body has an active portion in which the first electrode and the second electrode are arranged to overlap in a laminate direction of the laminate body, and inactive portions in which the first electrode and the second electrode are arranged not to overlap in the laminate direction of the laminate body. The inactive portions are provided on both sides of the active portion.
    Type: Application
    Filed: October 18, 2007
    Publication date: June 12, 2008
    Applicant: TDK CORPORATION
    Inventors: Kazuo Mochizuki, Kazuo Nagata, Yuzo Sawara