US Patent Issued to SUMITOMO ELECTRIC INDUSTRIES on Oct. 21 for "Method of manufacturing optical fiber and apparatus for manufacturing optical fiber" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,317, issued on Oct. 21, was assigned to SUMITOMO ELECTRIC INDUSTRIES LTD. (Osaka, Japan).

"Method of manufacturing optical fiber and apparatus for manufacturing optical fiber" was invented by Hiroshi Kohda (Osaka, Japan), Takaharu Sato (Osaka, Japan) and Katsuyuki Tsuneishi (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of manufacturing an optical fiber with a hole from a preform having a through hole is disclosed. The manufacturing method includes placing a preform in a drawing furnace, forming an optical fiber by melting and drawing the preform in the drawing furnace while a gas is introduced into the through hole, capturing...