Patents by Inventor Isamu Omura

Isamu Omura 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).

  • Differential circuit
    Patent number: 4577121
    Abstract: A differential circuit, such as a comparator circuit or an operational amplifier circuit, including an output-error preventing circuit having an npn transistor and a constant voltage source. The output of the differential circuit is kept at the correct value corresponding to the difference of two inputs of the differential circuit, even if one of the two inputs becomes negative.
    Type: Grant
    Filed: December 17, 1982
    Date of Patent: March 18, 1986
    Assignee: Fujitsu Limited
    Inventors: Yoshiaki Sano, Isamu Omura, Ryo Hiramatsu