Patents by Inventor Yoshiharu Maruyama

Yoshiharu Maruyama 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).

  • Floor cable with folded portions for making branch connections and method of producing same
    Patent number: 3949156
    Abstract: This invention provides an improved structure of a floor cable used, for example, for a telephone cord in an office room, and also a method of producing such floor cable. The floor cable comprises a plurality of insulated core wires within a plastic cable sheath.Each of the insulated core wires has a plurality of folded portions along the wire length, and the cable sheath for the core wires has such cross section that a plurality of radial fins are provided on the thin circumference. Thus, the ripping out of the sheath for drawing out the desired wire to connect or branch the floor cable can be easily carried out.
    Type: Grant
    Filed: December 11, 1974
    Date of Patent: April 6, 1976
    Assignees: Hitachi Cable Limited, Nippon Telegraph & Telephone Public Corporation
    Inventors: Nagato Niimura, Ichiro Kinoshita, Yoshiharu Maruyama, Ryuichi Kurihara, Morito Yoshihara, Toshio Suzuki, Yujiro Hashimoto, Masahiro Imazawa