ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,857, issued on Aug. 19, was assigned to HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY (Hubei, China).

"Laser powder bed fusion forming device and method for large-size ring/frame-shaped metal piece" was invented by Xiaoyan Zeng (Hubei, China), Kaiwen Wei (Hubei, China), Youguang Fan (Hubei, China) and Mengna Liu (Hubei, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A laser powder bed fusion forming device for a large-size ring/frame-shaped metal piece. Said device includes a forming cylinder, a substrate, a galvanometer array and a dust removal module. The forming cylinder is ring/frame-shaped and is adapted to the inner and outer contours of...