Patents by Inventor Horoshi Yokota

Horoshi Yokota 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 of drawing optical fiber
    Patent number: 5320658
    Abstract: There is provided a process of melt drawing an optical fiber from a preform therefor in which a heating furnace comprising a muffle tube inside thereof through which the optical fiber is passed is provided immediately below a melt drawing furnace to further draw the optical fiber while heated, and an interior of the muffle tube is kept in an atmosphere selected from the group consisting of an inert atmosphere, an atmosphere comprising oxygen gas and an atmosphere comprising hydrogen gas.
    Type: Grant
    Filed: August 3, 1992
    Date of Patent: June 14, 1994
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yuichi Ohga, Shinji Ishikawa, Hiroo Kanamori, Ichiro Yoshimura, Horoshi Yokota