ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,101, issued on April 14, was assigned to SUMITOMO BAKELITE Co. LTD. (Tokyo).
"Manufacturing method of optical waveguide" was invented by Motoya Kaneta (Tokyo) and Hirotake Imai (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "The manufacturing method of an optical waveguide of the present invention includes a step of preparing a workpiece which includes a core layer including a core portion-forming region and has a sheet shape and a step of cutting out an optical waveguide from an inside of the core portion-forming region in the workpiece. The core layer satisfies all of the following requirements (a), (b), and (c). (a) the core layer contains...