Patents by Inventor Koshi Ishihara

Koshi Ishihara 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).

  • Patent number: 3978275
    Abstract: A telecommunication cable comprises a plurality of conductor units bundled together, each conductor unit occupying a prescribed position in the cross-section of the cable and each conductor unit including at least four conductor pairs. The cable includes a plurality of lengthwise adjacent continuously connected sections, the conductor pairs of the conductor units being systematically interchanged in position relative to other conductor pairs of its respective conductor unit at each of said adjacent sections, and the conductor pairs being further systematically interchanged between conductor units at selected ones of the adjacent sections, so that both the grouping of the conductor pairs and the positions of the conductor units are systematically interchanged along the length of the cable. This systematic interchanging decreases the length over which any two conductor pairs are immediately adjacent each other and thereby reduces the cross-talk among the conductor pairs of the cable.
    Type: Grant
    Filed: January 29, 1975
    Date of Patent: August 31, 1976
    Assignee: Nippon Telegraph and Telephone Public Corporation
    Inventors: Koshi Ishihara, Akira Sakamoto