ALEXANDRIA, Va., March 3 -- United States Patent no. 12,564,174, issued on March 3, was assigned to Zhejiang Beijing Technology Co. Ltd. (Lishui, China).
"Automatic cat litter box" was invented by Weihong Ying (Lishui, China), Ximing Yin (Lishui, China) and Zhoulin Ying (Lishui, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An automatic cat litter box is provided, which includes a base; a drum rotatably provided on the base, the drum is installed on the base through a weighing mechanism; a guide-sand plate and a filter-sand mesh provided in the drum through a detachable structure; a toilet compartment cover provided on the base through an adjustable mechanism, and an internal structure of the drum is ...