Patents by Inventor Junichiro Oike

Junichiro Oike 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).

  • Semiconductor device having a fixed state by injected impurity
    Patent number: 6107665
    Abstract: The present invention includes two transistors every output signal line connected at crosspoints of a plurality of input signal lines and a plurality of output signal lines, with a channel region of one of these transistors being implanted or diffused with an impurity so as to be normally in an active state. By then selectively making electrical connection with one of the plurality of output signal lines, the coded data cannot be easily known because the corresponding relationship of the input signal lines and the output signal lines cannot be confirmed from the wiring layout.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: August 22, 2000
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Junichiro Oike