ALEXANDRIA, Va., April 15 -- United States Patent no. 12,599,210, issued on April 14.
"Portable heated lunch box" was invented by Xinxing Wang (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A portable heated lunch box comprises a housing, an intermediate housing, a liner, a battery, a heating tube, a heat-conducting plate, a temperature sensing module and a control module. The intermediate housing is sleeved inside the housing, and the liner is sleeved inside the intermediate housing; the battery, the heating tube and the heat-conducting plate are arranged between the bottoms of the housing and the intermediate housing, the heat-conducting plate fits with the bottom of the intermediate housi...