Patents by Inventor Ikuo Arai

Ikuo Arai 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).

  • Densitometer using a microwave
    Patent number: 5502393
    Abstract: A densitometer using a microwave comprises a microwave detection section, a phase detection section, and a density calculation section. The microwave detection section picks up a first microwave receiving signal by transmitting and receiving a microwave of a frequency band of 1.4 --GHz-- to 1.75 --GHz-- to/from a reference fluid, and a second microwave receiving signal by transmitting and receiving a microwave of a frequency band of 1.4 --GHz-- to 1.75 --GHz-- to/from a measuring fluid. The phase detection section obtains a phase difference between the first microwave receiving signal and the second microwave receiving signal. The density calculation section calculates the density of measuring fluid based on the phase difference obtained by the phase detection section.
    Type: Grant
    Filed: March 30, 1994
    Date of Patent: March 26, 1996
    Assignees: Kabushiki Kaisha Toshiba, Tokyo Metropolitan
    Inventors: Seiji Yamaguchi, Takeshi Yamaura, Takatsugu Ogata, Tsutomu Suzuki, Ikuo Arai