Patents by Inventor Toshikazu Miyasaka

Toshikazu Miyasaka 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).

  • Adaptive data ciphering/deciphering apparatuses and data communication system using these apparatuses
    Patent number: 5253293
    Abstract: A data communication system adaptable to a ciphered data communication includes a data transmission line (3) for transmitting ciphered or non-ciphered data between a data transmitting device and a data receiving device 11, a data transmitting device (1) for transmitting data, a data receiving device (5) for receiving data transmitted through the data transmitting device, a data ciphering apparatus (2) on the side of the data transmitting device, and a data deciphering apparatus (4) on the side of the data receiving device. The data ciphering apparatus including switching device (2A), line condition detector device (2B) control code monitor, scrambling device (2E), and drive control (2D). The line condition detector device, the control code monitor, and the scrambling device supply the transmission line through the switching device with ciphered data of the data from the data transmitting device.
    Type: Grant
    Filed: January 5, 1993
    Date of Patent: October 12, 1993
    Assignee: Secom Co., Ltd.
    Inventors: Mineo Shigemitsu, Toshikazu Miyasaka, Kenichi Matsumoto