Patents by Inventor Shigeyuki Nnakada

Shigeyuki Nnakada 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).

  • FLUORESCENCE DETECTION DEVICE USING INTENSITY-MODULATED LASER LIGHT AND FLUORESCENCE DETECTION METHOD
    Publication number: 20110168917
    Abstract: A fluorescence detection device for a flow site meter emits laser light intensity-modulated in accordance with a modulation signal and acquires a fluorescent signal of fluorescence emitted from a measurement object that passes through a measurement point of the laser light. The fluorescence detection device generates, separately from the modulation signal, a reference signal having a frequency different from a frequency of the modulation signal and a phase in synchronization with a phase of the modulation signal. The fluorescence detection device determines a fluorescent relaxation time of the measurement object from the fluorescent signal by using the reference signal.
    Type: Application
    Filed: September 16, 2009
    Publication date: July 14, 2011
    Applicant: MITSUI ENGINEERING & SHIPBUILDING CO., LTD.
    Inventors: Kyouji Doi, Shigeyuki Nnakada, Hironori Hayashi, Kazuteru Hoshishima