Patents by Inventor Masaji Yahagi

Masaji Yahagi 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).

  • Optical fiber branch cable, method of wiring the same, and method of providing the same
    Patent number: 7927025
    Abstract: An optical fiber branch cable is provided that comprises a branch portion disposed stably with respect to a multi-core optical fiber cable of a trunk line from which branching is performed, that is excellent in handleability as a cable, and that exhibits high workability. In the optical fiber branch cable of the invention, in a middle of a multi-core optical fiber cable 2 of a trunk line, a branch portion 11 is disposed. The branch portion 11 has: a base member 16 which is attached so as to cover a tensile-strength wire 9 in a portion where a cable jacket 10 of the multi-core optical fiber cable 2 is removed away; a multi-core optical connector 30 which is connected to the tip end of a tape unit 4 drawn out from the multi-core optical fiber cable 2; an extra-length housing portion 18 which houses an extra length of the tape unit 4 to which the multi-core optical connector 30 is connected; and a connector attaching portion 19 to which the multi-core optical connector 30 is attachable in a plural number.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: April 19, 2011
    Assignees: Sumitomo Electric Industries, Ltd., Toyokuni Electric Cable Co., Ltd.
    Inventors: Kenichiro Ohtsuka, Katsuyuki Aihara, Keisuke Okada, Masaji Yahagi, Hiroshi Nagai, Hideaki Tajima, Kimio Ito, Toshiyuki Igarashi
  • Optical Fiber Branch Cable, Method of Wiring the Same, and Method of Providing the Same
    Publication number: 20090304339
    Abstract: An optical fiber branch cable is provided that comprises a branch portion disposed stably with respect to a multi-core optical fiber cable of a trunk line from which branching is performed, that is excellent in handleability as a cable, and that exhibits high workability. In the optical fiber branch cable of the invention, in a middle of a multi-core optical fiber cable 2 of a trunk line, a branch portion 11 is disposed. The branch portion 11 has: a base member 16 which is attached so as to cover a tensile-strength wire 9 in a portion where a cable jacket 10 of the multi-core optical fiber cable 2 is removed away; a multi-core optical connector 30 which is connected to the tip end of a tape unit 4 drawn out from the multi-core optical fiber cable 2; an extra-length housing portion 18 which houses an extra length of the tape unit 4 to which the multi-core optical connector 30 is connected; and a connector attaching portion 19 to which the multi-core optical connector 30 is attachable in a plural number.
    Type: Application
    Filed: February 15, 2007
    Publication date: December 10, 2009
    Inventors: Kenichiro Ohtsuka, Katsuyuki Aihara, Keisuke Okada, Masaji Yahagi, Hiroshi Nagai, Hideaki Tajima, Kimio Ito, Toshiyuki Igarashi