Patents by Inventor Wataru Takegawa

Wataru Takegawa 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).

  • Double-balanced mixer
    Patent number: 5307518
    Abstract: A double-balanced mixer which includes four diodes effectively connected to each other in a bridge connection on a substrate. The four diodes are formed into two sets of diodes, each one set including two of the four diodes connected to the same input line, with two twin-diodes each including two of the four diodes formed on the same semi-conductor chips being used for the two sets of the diodes.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: April 26, 1994
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Youji Maeda, Wataru Takegawa, Yoshikuni Higashikawa, Akimasa Matsushima