Patents by Inventor Mituru Ohishi

Mituru Ohishi 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).

  • Non-dispersive infrared gas analyzer including gas-filled radiation source
    Patent number: 5429805
    Abstract: A non-dispersive infrared gas analyzer, with improved linearity in output concentration signal especially in measuring gas species of high concentration, includes a measuring cell into which a gas to be measured is fed, a non-selective infrared radiation sensor disposed on one side of the measuring cell, an optical band-pass filter disposed between the measuring cell and the infrared radiation sensor, and a nonselective infrared radiation source, disposed on the other side of the measuring cell and having an infrared radiation transmission window, wherein the radiation source further includes a gas filled therein at a predetermined partial pressure and the filled gas has at least a common partial molecular structure with the gas to be measured.
    Type: Grant
    Filed: January 5, 1994
    Date of Patent: July 4, 1995
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Masahiro Uno, Hitoshi Okuyama, Mituru Ohishi, Kozo Akao, Mitsuo Taniyama