Patents by Inventor Fuminori Nakajima

Fuminori Nakajima 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 cord
    Patent number: 7153570
    Abstract: An optical fiber cord which is a single core optical fiber cord having an outer diameter of 1.2 mm or less, and has a structure in which an optical fiber core wire having a resin coating is provided at the center, a tensile-strength-fiber layer is provided around the outer periphery of the optical fiber core wire, and a coating layer is further provided around the outer periphery of the tensile-strength-fiber layer, wherein the coating layer is composed of a non-halogen fire-retardant resin, is disclosed. This optical fiber cord has excellent fire retardant, mechanical and handling properties, although the outer diameter thereof is made smaller.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: December 26, 2006
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Fuminori Nakajima, Nobuhisa Ishii, Masao Tachikura, Shigenori Uruno, Hisashi Izumita, Hitoshi Ishimaru, Kuniaki Yamaguchi
  • Optical fiber cord
    Patent number: 6893719
    Abstract: A single core optical fiber cord having an outer diameter of 1.2 mm or less, and having a structure in which an optical fiber core wire having a resin coating provided at the center, a tensile-strength-fiber layer around the periphery of the optical fiber core wire, and a coating layer around the outer periphery of the tensile-strength-fiber layer is provided. The coating layer can be composed of a non-halogen fire-retardant resin. The optical fiber cord has excellent fire retardant, mechanical and handling properties, although the outer diameter thereof is 1.2 mm or less.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: May 17, 2005
    Assignees: The Furukawa Electric Co., Ltd., Nippon Telegraph and Telephone Corporation, Okano Electric Wire Co., Ltd.
    Inventors: Fuminori Nakajima, Nobuhisa Ishii, Masao Tachikura, Shigenori Uruno, Hisashi Izumita, Hitoshi Ishimaru, Kuniaki Yamaguchi
  • Optical fiber cord
    Publication number: 20050069273
    Abstract: An optical fiber cord which is a single core optical fiber cord having an outer diameter of 1.2 mm or less, and has a structure in which an optical fiber core wire having a resin coating is provided at the center, a tensile-strength-fiber layer is provided around the outer periphery of the optical fiber core wire, and a coating layer is further provided around the outer periphery of the tensile-strength-fiber layer, wherein the coating layer is composed of a non-halogen fire-retardant resin, is disclosed. This optical fiber cord has excellent fire retardant, mechanical and handling properties, although the outer diameter thereof is made smaller.
    Type: Application
    Filed: November 15, 2004
    Publication date: March 31, 2005
    Inventors: Fuminori Nakajima, Nobuhisa Ishii, Masao Tachikura, Shigenori Uruno, Hisashi Izumita, Hitoshi Ishimaru, Kuniaki Yamaguchi