ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,408,814, issued on Sept. 9.
"Air tube of shoe dryer" was invented by Chengchuan Lin (Xiamen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An air tube of a shoe dryer is provided. A top of the air tube has at least one air outlet. An air passage is formed in the air tube. A top surface of the air tube is provided with at least one support rib. At least one guide passage is provided on an outer side wall of the air tube or inside the air tube. The guide passage is independent of the air passage of the air tube. The air tube of the shoe dryer can prevent the backflow of warm air when the air tube is in operation and improve the convective drying e...