ALEXANDRIA, Va., July 7 -- United States Patent no. 12,674,936, issued on July 7, was assigned to Huawei Technologies'Co.'Ltd.' (Shenzhen, China).

"Wavelength-division multiplexing device and communications device" was invented by Qiang Wang (Shenzhen, China), Wenjie Zhuang (Dongguan, China) and Xiaolei Li (Dongguan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A wavelength-division multiplexing device or a communications device may include a fastener, optical fibers, a filter, and a lens. The fastener is provided with an optical fiber positioning hole and a filter mounting groove, the filter mounting groove is disposed on a side of a tail end that is of the optical fiber positioning hole and that is...