Patents by Inventor Katsuo Kitajima

Katsuo Kitajima 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).

  • Power supply system for a quadrupole mass spectrometer
    Patent number: 4703190
    Abstract: A power supply system for a quadrupole mass spectrometer includes an RF (radio frequency) power source for generating RF voltages and a voltage divider functioning as a DC (direct current) voltage generating circuit. This voltage divider divides the RF voltages and then rectifies them so as to derive DC voltages while maintaining a proportional relationship to the RF voltages. Thereafter, the DC voltages are superimposed on the RF voltages. The resultant voltages are applied to the electrodes of the quadrupole mass spectrometer.
    Type: Grant
    Filed: June 24, 1986
    Date of Patent: October 27, 1987
    Assignee: Anelva Corporation
    Inventors: Yoshikazu Tamura, Katsuo Kitajima