ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,798, issued on April 21, was assigned to SUMITOMO ELECTRIC INDUSTRIES LTD. (Osaka, Japan).
"Optical fiber" was invented by Yudai Watanabe (Osaka, Japan), Kazuyuki Sohma (Osaka, Japan), Iwao Okazaki (Osaka, Japan) and Takahiro Nomura (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The optical fiber includes a glass fiber and a coating resin layer. The coating resin layer includes a primary resin layer and a secondary resin layer. The glass fiber has an outer diameter of from 79 micro metre to 81 micro metre. The secondary resin layer has an outer diameter of from 120 micro metre to 170 micro metre. The primary resin layer has an in situ...