ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,378,755, issued on Aug. 5, was assigned to XIAMEN R&T PLUMBING TECHNOLOGY Co. LTD. (Fujian, China).
"Water tank drainage volume control structure, and toilet" was invented by Rongyu Zhang (Xiamen, China) and Xingdong Wang (Xiamen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a water tank drainage volume control structure comprising: a water tank body (1), having a first water storage chamber (11) and a second water storage chamber (12), the first water storage chamber (11) being provided with a first drainage channel, and the second water storage chamber (12) being provided with a second drainage channel; a drainage valve (2), used f...