Patents by Inventor Yasumichi Hatayama

Yasumichi Hatayama 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).

  • Publication number: 20010028862
    Abstract: The present invention is to provide a test device for a multi-items where in all the test papers for all items for one test are wetted by one shot dropping and transportation of a detecting part (module) or a test device is not required upon measurement. Also, the present invention has the object to provide an analyzer for a test device which makes it possible as in the known visual tests to conduct measurement easily while the test device is kept on a cup and thus can be used in bed side medical examinations and regional medical examinations with no considerable problem.
    Type: Application
    Filed: January 19, 2001
    Publication date: October 11, 2001
    Inventors: Kenji Iwata, Tadashi Hamanaka, Yasumichi Hatayama, Shogo Wada, Haruki Oishi
  • Patent number: 4740460
    Abstract: Endotoxin contents in samples can be determined qualitatively, or quantitatively, singly or in parallel, with high precision in a short time by a process comprising applying a light to each sample solution, measuring an initial transmitted light amount I.sub.0 and a transmitted light amount at a time t, I(t), to give a ratio R(t)=I(t)/I.sub.0, and judging a gelation point by a threshold value of R(t), or further obtaining a gelation time from the gelation point. An apparatus used therefor is also disclosed.
    Type: Grant
    Filed: June 26, 1985
    Date of Patent: April 26, 1988
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Yoshitsugu Sakata, Haruki Oishi, Yasumichi Hatayama, Hiromi Shiraishi, Kazuya Yanagisawa