Patents by Inventor Yasuhiro Naganuma

Yasuhiro Naganuma 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 product, method of fabricating optical cable, and characteristic evaluation method
    Patent number: 7379646
    Abstract: The present invention relates to an optical fiber product suitable for fabricating an optical cable that requires a complicated length adjustment. The optical fiber product includes an effective use portion used as the optical cable, surplus portions connected to both ends of the effective use portion, and a distinguishing structure clearly indicating boundary portions between the effective use portion and the surplus portions. With the above structure, the surplus portions that become finally unnecessary are surely cut off in a fabrication step of the optical cable, thus enabling collect use of only effective use portion as the optical cable.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: May 27, 2008
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yasushi Koyano, Hiroyoshi Yamamoto, Yasuhiro Naganuma
  • Optical fiber product, method of fabricating optical cable, and characteristic evaluation method
    Publication number: 20060018610
    Abstract: The present invention relates to an optical fiber product suitable for fabricating an optical cable that requires a complicated length adjustment. The optical fiber product includes an effective use portion used as the optical cable, surplus portions connected to both ends of the effective use portion, and a distinguishing structure clearly indicating boundary portions between the effective use portion and the surplus portions. With the above structure, the surplus portions that become finally unnecessary are surely cut off in a fabrication step of the optical cable, thus enabling collect use of only effective use portion as the optical cable.
    Type: Application
    Filed: October 12, 2004
    Publication date: January 26, 2006
    Inventors: Yasushi Koyano, Hiroyoshi Yamamoto, Yasuhiro Naganuma
  • Method of making an optical fiber with an improved UV-curable resin
    Patent number: 6530243
    Abstract: A method of drawing an optical fiber which can improve the efficiency in manufacture without deforming resin coatings is provided.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: March 11, 2003
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kazuya Kuwahara, Ichiro Tsuchiya, Yasuhiro Naganuma