ALEXANDRIA, Va., June 12 -- United States Patent no. 12,298,571, issued on May 13, was assigned to SUMITOMO ELECTRIC INDUSTRIES LTD. (Osaka, Japan).

"Optical fiber bundle structure, optical connection structure, and method of manufacturing optical fiber bundle" was invented by Osamu Shimakawa (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A plurality of optical fibers are kept in a fiber accommodating portion. In each of the optical fibers, a second diameter portion has a diameter larger than that of a first diameter portion. A second accommodating portion of the fiber accommodating portion has an inner diameter larger than that of a first accommodating portion of the fiber accommodating portio...