Patents by Inventor Mitsutoshi Hirata

Mitsutoshi Hirata 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).

  • Ammonia sensor
    Patent number: 5252292
    Abstract: An ammonia sensor consisting of at least one pair of electrodes and an ammonia-sensing material comprising a polyaniline filling the space between the electrodes.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: October 12, 1993
    Inventors: Mitsutoshi Hirata, Ryutoku Yosomiya, Soichiro Takenishi
  • Display apparatus
    Patent number: 4788535
    Abstract: A display apparatus having an inverting circuit which can be switched to invert white signals into black signals and black signals into white signals of image signal to reverse the contract of a black and white signal. This contrast can be switched independent of other color signals, or other color signals can be changed to complementary colors. The background color contrast can also be changed.
    Type: Grant
    Filed: November 2, 1987
    Date of Patent: November 29, 1988
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshihisa Chikara, Mitsutoshi Hirata, Shuichi Takatori