Patents by Inventor Shigeru Kisanuki

Shigeru Kisanuki 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 producing porous preforms for optical fibers
    Patent number: 4713107
    Abstract: An apparatus is provided for the production of a porous preform of SiO.sub.2 used in the manufacture of optical fiber wherein damage to the preform caused by falling clusters of SiO.sub.2 or GeO.sub.2 formed on the wall of the deposition chamber is eliminated. In accordance with the invention, a conductive shielding member is provided inside the wall defining the deposition chamber. This shielding member eliminates an electrostatic field produced on the wall by charging, therefore preventing the adherence of fine particles thereto.
    Type: Grant
    Filed: December 10, 1986
    Date of Patent: December 15, 1987
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Masaaki Yoshida, Shigeki Endo, Shigeru Kisanuki, Hideo Kakuzen