Patents by Inventor Susumu Koishihara

Susumu Koishihara 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).

  • Water-tight rubber or plastic insulated cable
    Patent number: 5095175
    Abstract: A water-tight rubber or plastic insulated cable includes water-tight compound which is injected into apertures among stranded wires for a conductor. The stranded conductor is compressed to have a solidity factor of 85 to 95% of the conductor. The water-tight compound is injected into the apertures among the stranded wires except for an outermost surface of the conductor. The water-tight compound has a scorch time of more than 20 minutes under a temperature of 130.degree. C. and includes conductive carbon of 50 to 60 weight %.
    Type: Grant
    Filed: April 24, 1991
    Date of Patent: March 10, 1992
    Assignee: Hitachi Cable, Ltd.
    Inventors: Fumio Yoshida, Katsuyuki Isaka, Susumu Koishihara, Tsutomu Tanji