Patents by Inventor Tsuguo Satou

Tsuguo Satou 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).

  • Apparatus for forming porous preform used to fabricate optical fiber
    Patent number: 5318432
    Abstract: An apparatus for forming a porous preform that is useable to an optical fiber by extruding a plastifiable material having silica powder as a main component thereof. The apparatus includes an extruding main body having a cylinder and a screw for extruding the plastifiable material from the cylinder and a material passage member connected to the cylinder so as to communicate therewith. The material passage member has a projection member which projects into the material passage member for preventing a lamination of the plastifiable material. The apparatus also includes a molding head connected to the material passage member so as to communicate therewith.
    Type: Grant
    Filed: August 25, 1992
    Date of Patent: June 7, 1994
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Takeshi Yagi, Tsuguo Satou, Yoshiaki Koinuma, Kazuaki Yoshida