ALEXANDRIA, Va., July 21 -- United States Patent no. 12,687,300, issued on July 21, was assigned to Piyong Bao (Guan County, China).
"Portable fire-starting device" was invented by Piyong Bao (Guan County, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a portable fire-starting device, including at least two inner housing plates, at least two outer housing plates, and a connection assembly. The inner housing plates are provided with ventilation holes, and the inner housing plates enclose to form an inner housing configured to accommodate a combustible material. One of the outer housing plates is provided with an air inlet hole, and the outer housing plates enclose to form an outer housing. ...