Patents by Inventor Kumiko Nagaura

Kumiko Nagaura 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).

  • Method and apparatus for manufacture of quartz oscillator
    Patent number: 6203644
    Abstract: A method and apparatus for manufacturing high-frequency oscillator elements from a workpiece material includes a tool holder formed of magnetic material providing a magnetic field at a tip thereof and a spherical whetstone made of a magnetic material. A grinding mount is made of a magnetic material installed on a main rotating shaft proximate the tool holder through which flux of the magnetic field is channeled. The spherical whetstone held at the tip of the tool holder by magnetic attraction. The workpiece material is mounted on the grinding mount and the tool holder is rotated around an axis coincident with a center of the spherical whetstone while bringing the spherical whetstone into engagement with the workpiece material to lap the workpiece material.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: March 20, 2001
    Inventors: Yoshiaki Nagaura, Kumiko Nagaura, Zenichiro Nagaura