Patents by Inventor Motoyasu Hanji

Motoyasu Hanji 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).

  • Manufacture process of quartz vibrator
    Patent number: 5998233
    Abstract: Since etching of a crotch portion of quartz vibrator defined by segment 18, first segment 13, and second segment 17 advances in accordance with the crystal orientations of quartz, the shape of side surfaces of two quartz vibrating bars opposite to each other with this crotch portion in between can be made symmetric, whereby stress applied on the two quartz vibrating bars can be equalized.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: December 7, 1999
    Assignee: Toyota JidoshaKabushiki Kaisha/Kinseki Limited
    Inventors: Nobuyoshi Sugitani, Motohiro Fujiyoshi, Motoyasu Hanji
  • Tuning fork-type piezoelectric vibrator
    Patent number: 4173726
    Abstract: A tuning fork-type piezoelectric vibrator having electrodes for the excitation formed on the legs of the vibrator body which electrodes extend for at most subsequently half the length of said leg reveals a powerful suppression of the vibration modes of higher orders and substantially no increase in the series resonant impedance in the vibration modes of fundamental frequency.
    Type: Grant
    Filed: July 8, 1976
    Date of Patent: November 6, 1979
    Assignee: Kabushiki Kaisha Kinekisha-Kenkyujo
    Inventor: Motoyasu Hanji