ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,542, issued on June 17, was assigned to Shenzhen Aiper Intelligent Co. Ltd. (Shenzhen, China).
"Swimming pool cleaning robot" was invented by Yang Wang (Shenzhen, China), Xueliang Yu (Shenzhen, China) and Chunlin Cheng (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A swimming pool cleaning robot includes a bottom shell, a sealed tank and a first counterweight block, the sealed tank is provided inside the bottom shell, and the first counterweight block is provided inside the sealed tank. The first counterweight block is provided in a sealed tank of a swimming pool cleaning robot without additionally providing an installation space fo...