Patents by Inventor Mitsuo Ishibashi

Mitsuo Ishibashi 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).

  • Dust radiation monitor apparatus and dust sampling apparatus used therefor
    Patent number: 6326623
    Abstract: A pipe switching unit switches connections between the radiation monitor side and a plurality of sampling pipes which are installed in different sampling places to introduce air from the respective sampling places. An intermittent dust radiation monitor collect, in a dust collection section, dust in the air introduced through each sampling pipe sequentially switched by the pipe switching unit, and measures the radioactivity concentration of dust in the dust collection section. A continuous dust radiation monitor collects, in a dust collection section, dust in the air introduced through a fixed sampling pipe switched by the pipe switching unit, and measures the radioactivity concentration of dust in the dust collection section. With this arrangement, while intermittent measurement is performed in normal operation as in the prior art, the intermittent measurement is switched to continuous measurement, as needed, thereby improving the measurement precision.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: December 4, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Keiichi Chiba, Mitsuo Ishibashi, Yorimasa Endo, Eiji Noda, Yasuo Suzuki, Noriyuki Seki, Akira Yunoki