ALEXANDRIA, Va., June 16 -- United States Patent no. 12,303,057, issued on May 20, was assigned to ZHEJIANG BAHE KITCHENWARE Co. LTD. (Jinhua, China).
"Physical non-stick pan with convex-concave structure, and manufacturing method thereof" was invented by Ke Wang (Jinhua, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A physical non-stick pan with a convex-concave structure, and a manufacturing method thereof are provided. The physical non-stick pan includes a pan body, where the convex-concave structure is formed on an inner surface of the pan body, the convex-concave structure comprises a convex edge protruding from the inner surface of the pan body and a recess enclosed by the convex edge, and a phy...