Patents by Inventor Yoshinori Makio

Yoshinori Makio 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).

  • Process for producing glass preform for optical fiber
    Patent number: 5597398
    Abstract: A process for producing a porous glass preform for optical fiber by depositing fine glass particles on an outer surface of a glass material while moving the glass material, including the steps of: preheating a portion of the glass material for not less than 5 minutes to clean the portion of the glass material in an apparatus for depositing fine glass particles; and depositing fine glass particles on the portion of the glass material cleaned by the preheating, in the apparatus for depositing fine glass particles.
    Type: Grant
    Filed: June 15, 1994
    Date of Patent: January 28, 1997
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Shinji Ishikawa, Yoshiki Chigusa, Motonori Nakamura, Yoshinori Makio, Morio Watanabe