ALEXANDRIA, Va., March 17 -- United States Patent no. 12,576,581, issued on March 17, was assigned to NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS (Nanjing, China).

"Interlayer strengthening method for continuous fiber additive manufacturing based on pressure injected Z-pin-like structures" was invented by Congze Fan (Nanjing, China), Wenzhe Song (Nanjing, China), Zhongde Shan (Nanjing, China), Jinghua Zheng (Nanjing, China), Yiwei Chen (Nanjing, China) and Yaxing Song (Nanjing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An interlayer strengthening method for continuous fiber additive manufacturing based on pressure injected Z-pin-like structures is provided. A grid frame is printed with cont...