Patents by Inventor Toshihiko Sakaide

Toshihiko Sakaide 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).

  • Absorptivity detecting apparatus, chromatographic apparatus, method of detecting absorptivity and method of chromatography
    Patent number: 5892581
    Abstract: In order to suppress base line drift due to change in a light source and to start analysis with a short waiting time so as to improve quantitative accuracy of analysis, a detected signal in a measurement wavelength and a detected signal in a reference wavelength are measured at each of arbitrary light intensity points by varying light intensity of a light source, and the corresponding relationship between the wavelengths is stored. An incident light intensity of the measurement wavelength is estimated from a detected signal in the reference wavelength based on the stored data.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: April 6, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Toshihiko Sakaide, Masahito Ito, Yoshio Fujii, Shigeru Matsui