Patents by Inventor Ryusuke Miki

Ryusuke Miki 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).

  • Security system utilizing loosely contained optical fiber
    Patent number: 5416467
    Abstract: A security system, including a cable having a groove formed in the inside thereof to accommodate therein an optical fiber with an excessive length, a plurality of supports having mandrels to support the optical cable so as to provide a fence, a light transmitter to inject light into one end of the optical cable and a light receiver to detect the light projecting out of the other end of the optical cable so that any transmission loss through the optical cable due to an intrusion of the fence may be measured. The cable is formed so that when tension is applied to the optical cable, a transmission loss is detected. The resulting system has a threshold capability which distinguishes valid from false intrusions.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: May 16, 1995
    Assignees: Sumitomo Electric Industries, Ltd., Matsushita Electric Works, Ltd.
    Inventors: Junichi Ohta, Toshinori Wakami, Kazuhiro Okamoto, Ryusuke Miki, Yoshiaki Kanbe