ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,602, issued on May 20, was assigned to Aiper Global Pte. Ltd. (Singapore).

"Controllable sinking and floating swimming pool robot and sinking and floating control method for swimming pool robot" was invented by Xiaofeng Liu (Singapore) and Yongfei Hua (Singapore).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to the field of underwater robots, and in particular to a controllable sinking and floating swimming pool robot and a sinking and floating control method for a swimming pool robot. The controllable sinking and floating swimming pool robot of the present disclosure includes a sinking and floating control unit config...