Patents by Inventor Matsutaro Naito

Matsutaro Naito 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).

  • AT cut quartz crystal resonator element and method for manufacturing the same
    Patent number: 7608987
    Abstract: An AT cut quartz crystal resonator element includes a quartz crystal element piece having an exciting part formed from an AT cut quartz crystal plate in a rectangular shape having an X-axis direction of a quartz crystal set to a long side, and an exciting electrode formed on each of front and back main surfaces of the exciting part, in which each side surface in the longitudinal direction of the exciting part is composed of two faces, an m-face of a quartz crystal and a crystal face other than the m-face.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: October 27, 2009
    Assignee: Epson Toyocom Corporation
    Inventors: Matsutaro Naito, Yoshiyuki Aoshima, Kenji Komine
  • AT cut quartz crystal resonator element and method for manufacturing the same
    Publication number: 20080036335
    Abstract: An AT cut quartz crystal resonator element includes a quartz crystal element piece having an exciting part formed from an AT cut quartz crystal plate in a rectangular shape having an X-axis direction of a quartz crystal set to a long side, and an exciting electrode formed on each of front and back main surfaces of the exciting part, in which each side surface in the longitudinal direction of the exciting part is composed of two faces, an m-face of a quartz crystal and a crystal face other than the m-face.
    Type: Application
    Filed: July 30, 2007
    Publication date: February 14, 2008
    Applicant: EPSON TOYOCOM CORPORATION
    Inventors: Matsutaro Naito, Yoshiyuki Aoshima, Kenji Komine
  • Mesa-shaped piezoelectric resonator element
    Publication number: 20070096596
    Abstract: A mesa-shaped piezoelectric resonator element including a resonator section having a thicker thickness than a peripheral section on the board surface of a piezoelectric substrate formed in a rectangular shape, wherein, when the length of the long side of the piezoelectric substrate is x and the board thickness of the resonator section is t, etching depth y of a level-difference section is set to fulfill a relationship in the following equation, based on the board thickness t. y = - 1.
    Type: Application
    Filed: September 27, 2006
    Publication date: May 3, 2007
    Applicant: EPSON TOYOCOM CORPORATION
    Inventors: Matsutaro Naito, Yoshiyuki Aoshima