ALEXANDRIA, Va., May 12 -- United States Patent no. 12,623,866, issued on May 12, was assigned to Qingdao University of Technology (Qingdao, China) and Qingdao Jimo Qingli intelligent manufacturing industry Research Institute (Qingdao, China).

"Process equipment system of hydraulic oil circuit blocks and automated production line thereof" was invented by Dewei Liu (Qingdao, China), Changhe Li (Qingdao, China), Aiguo Qin (Qingdao, China), Yusuf Suleiman Dambatta (Kaduna, Nigeria), Xin Cui (Qingdao, China), Mingzheng Liu (Qingdao, China), Teng Gao (Qingdao, China), Zecheng Zhang (Qingdao, China), Wenhao Xu (Qingdao, China), Hanqi Fan (Qingdao, China) and Junting Li (Qingdao, China).

According to the abstract* released by the U.S. Patent & T...