ALEXANDRIA, Va., July 21 -- United States Patent no. 12,685,978, issued on July 21, was assigned to Autobiography Co. Ltd. (Incheon, South Korea) and ENVIRONMENTAL CORPORATION OF INCHEON (Incheon, South Korea).

"Foldable agitator" was invented by Su Hyoun Kim (Seoul, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a foldable agitator. The foldable agitator according to one aspect of the present invention comprises: a coupling body; impeller arms rotatably coupled to the coupling body; and a piston, inserted in the coupling body so as to be movable vertically, for rotating the impeller arms in the process of moving to induce same to fold and unfold."

The patent was filed on Jan. 21, 2...