ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,480,324, issued on Nov. 25.
"Scum removal device" was invented by Zhengjin Yang (Zhejiang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A scum removal device, configured to placed inside water. The scum removal device includes a scum removal body and a floating assembly. The scum removal body includes a housing and a filter structure, the housing defines a filtering chamber therein, and the housing has an inlet port and an outlet port, the inlet port and the outlet port respectively communicates with the filtering chamber, and the filter structure is arranged in the filtering chamber; the floating assembly is arranged on the housing, the floatin...