ALEXANDRIA, Va., June 4 -- United States Patent no. 12,317,999, issued on June 3, was assigned to GUANGDONG WIREKING HOUSEWARES & HARDWARE Co. LTD (Foshan, China).

"Twistable and stackable shelf and connecting device thereof" was invented by Nengwen Liu (Foshan, China), Jianbin Wu (Foshan, China), Feifei Li (Foshan, China) and Jingyuan Liang (Foshan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A twistable and stackable shelf includes storage members, an elastic member, a first supporting pipe, a second supporting pipe, a first connecting member, and a second connecting member. Each of the first and second connecting member includes an end portion defining an inserting hole and an inserting portion d...