ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,209,999, issued on Jan. 28, was assigned to Shanghai Jiao Tong University (China) and New United Group Co. Ltd. (China).

"Method for determining equilibrium state of tensegrity structure" was invented by Wujun Chen (Shanghai), Jianhui Hu (Shanghai), Bing Zhao (Shanghai), Jun Yang (Changzhou, China) and Jiandong Xu (Changzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for determining the equilibrium state of a tensegrity structure includes: determining the critical bending moment that the tensegrity structure bears; calculating the tension of longitudinal tie rods; calculating the pressure of longitudinal compression members; calculat...