Patents by Inventor Kazuyoshi Kawakita

Kazuyoshi Kawakita 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).

  • Flexural-mode tuning-fork type quartz crystal resonator
    Patent number: 8212458
    Abstract: A flexural-mode tuning-fork type quartz crystal resonator includes a proximal portion, a pair of vibrating arm portions, and a plurality of first concave portions. The vibrating arm portions project in a direction from the proximal portion. The first concave portions are formed into groove shapes in the upper and lower principal surfaces of the proximal portion, and extend in the widthwise direction perpendicular to the longitudinal direction of the pair of vibrating arm portions. The first concave portions formed in the upper principal surface of the proximal portion and those formed in the lower principal surface of the proximal portion are arranged at a predetermined interval not to face each other.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: July 3, 2012
    Assignee: Kyocera Kinseki Corporation
    Inventors: Shigeru Kizaki, Ryota Kawai, Kazuyoshi Kawakita, Yoshiji Matsui, Shinichi Morishima
  • FLEXURAL-MODE TUNING-FORK TYPE QUARTZ CRYSTAL RESONATOR
    Publication number: 20100327707
    Abstract: A flexural-mode tuning-fork type quartz crystal resonator includes a proximal portion, a pair of vibrating arm portions, and a plurality of first concave portions. The vibrating arm portions project in a direction from the proximal portion. The first concave portions are formed into groove shapes in the upper and lower principal surfaces of the proximal portion, and extend in the widthwise direction perpendicular to the longitudinal direction of the pair of vibrating arm portions. The first concave portions formed in the upper principal surface of the proximal portion and those formed in the lower principal surface of the proximal portion are arranged at a predetermined interval not to face each other.
    Type: Application
    Filed: June 28, 2010
    Publication date: December 30, 2010
    Inventors: Shigeru Kizaki, Ryota Kawai, Kazuyoshi Kawakita, Yoshiji Matsui, Shinichi Morishima