Patents by Inventor Masahide Kawai

Masahide Kawai 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 amplifier circuit
    Patent number: 4820997
    Abstract: A differential amplifier circuit including not only first and second transistors whose emitters are coupled together through a resistor to form a differential transistor pair, but also first and second distortion-correcting transistors, is disclosed.
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: April 11, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Yuji Sano, Michitaka Osawa, Masahide Kawai