ALEXANDRIA, Va., June 17 -- United States Patent no. 12,313,491, issued on May 27, was assigned to SUMITOMO ELECTRIC INDUSTRIES LTD. (Osaka, Japan).

"Optical fiber bending loss measuring method" was invented by Chonde Tei (Utsunomiya, Japan), Tomoaki Hatanaka (Utsunomiya, Japan), Yuki Kawaguchi (Osaka, Japan) and Tomoko Terauchi (Utsunomiya, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical fiber bending loss measuring method for obtaining a bending loss of an optical fiber by applying bending to the optical fiber with mandrels provided between a feeding portion and a fixing portion and arranged alternately in a longitudinal direction of the optical fiber. The method includes fixing the optical...