Patents by Inventor Yoko Koga

Yoko Koga 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).

  • Switch Circuit
    Publication number: 20090027138
    Abstract: A switch circuit including: a plurality of MEMS switches connected in parallel or in series, which have different drive voltages; and a single voltage supply for driving the plurality of MEMS switches by the plurality of drive voltages, is used for a microwave circuit or an antenna circuit, to vary a configuration of the microwave circuit or the antenna circuit based on the drive voltage value. That is, the configuration of the microwave circuit or the antenna circuit can be varied based on the drive voltage value by using the switch circuit including the MEMS switches having the different drive voltages for the microwave circuit or the antenna circuit.
    Type: Application
    Filed: March 29, 2005
    Publication date: January 29, 2009
    Inventors: Tamotsu Nishino, Masatake Hangai, Yukihisa Yoshida, Shinichi Izuo, Hirokazu Taketomi, Tomohiro Takahashi, Kenichiro Kodama, Kazushi Nishizawa, Yoko Koga, Araki Ohno, Shinnosuke Soda, Moriyasu Miyazaki, Kenichi Miyaguchi
  • Concrete product containing a mixture of microbial cells
    Patent number: 6989266
    Abstract: A cement paste containing microbial cells which has a sustained effect and an excellent function of purifying water. This cement paste contains a mixture of Bacillus subtilis, Bacillus thuringiensis and Bacillus sphaericus cells at a mixing ratio by mass of 0.1 to 50:0.1 to 50:0.1 to 50.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: January 24, 2006
    Assignee: Koyoh Corporation, Ltd.
    Inventors: Masayuki Koga, Yoko Koga
  • Cement paste containing microbial cells
    Publication number: 20050029187
    Abstract: A cement paste containing microbial cells which has a sustained effect and an excellent function of purifying water. This cement paste contains a mixture of Bacillus subtilis, Bacillus thuringiensis and Bacillus sphaericus cells at a mixing ratio by mass of 0.1 to 50:0.1 to 50:0.1 to 50.
    Type: Application
    Filed: December 10, 2001
    Publication date: February 10, 2005
    Inventors: Masayuki Koga, Yoko Koga