Patents by Inventor Kazumi Matsumura

Kazumi Matsumura 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).

  • Mass spectrometer
    Patent number: 5567938
    Abstract: Ions generated by an ES ion supply are introduced into a mass spectrometer portion through a small hole in a second electrode after passing through a small hole in a heated first electrode, and are analyzed by a mass spectrometer. Corresponding to heating of the first electrode, a length of the small hole in the first electrode is determined to a predetermined adequate value.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: October 22, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Tadao Mimura, Yoshiaki Kato, Kazumi Matsumura
  • Mass spectrometer
    Patent number: 5298744
    Abstract: Ions generated by an ES ion supply are introduced into a mass spectrometer portion through a small hole in a second electrode after passing through a small hole in a heated first electrode, and are analyzed by a mass spectrometer. Corresponding to heating of the first electrode, a length of the small hole in the first electrode is determined to a predetermined adequate value.
    Type: Grant
    Filed: February 2, 1993
    Date of Patent: March 29, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Tadao Mimura, Yoshiaki Kato, Kazumi Matsumura