ALEXANDRIA, Va., March 3 -- United States Patent no. 12,567,646, issued on March 3, was assigned to CALB Co. Ltd. (Jiangsu, China).
"Battery" was invented by Jiuling Xu (Changzhou, China), Yongjie Zhang (Luoyang, China), Hao Zhao (Changzhou, China) and Lulu Zhang (Changzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A battery includes an explosion-proof valve and a battery casing. The explosion-proof valve is arranged in the battery casing. The explosion-proof valve includes a first straight line segment, a second straight line segment and a circular arc segment. Two ends of the circular arc segment are respectively connected to the first straight line segment and the second straight line segment....