US Patent Issued on April 8 for "Concentric-ring single-sided dovetail groove ceramic tile back mold core and manufactured ceramic tile" (Chinese Inventors)

ALEXANDRIA, Va., April 9 -- United States Patent no. 12,269,189, issued on April 8.

"Concentric-ring single-sided dovetail groove ceramic tile back mold core and manufactured ceramic tile" was invented by Rui Chen (Zhongshan, China) and Guo Chen (Zhongshan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A concentric-ring single-sided dovetail groove ceramic tile back mold core is disclosed. A vulcanized rubber of back mold core surface comprises raised patterns and recessed patterns integrally formed, pasted and covered on a back mold core iron substrate. The raised patterns are equidistantly offset outwards layer by layer with a central position of the back mold core as a center; and a side of each ra...