ALEXANDRIA, Va., June 5 -- United States Patent no. 12,279,343, issued on April 15.
"Portable hand warmer charging case and hand warmer assembly" was invented by Xueping Zhu (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A portable hand warmer charging case includes a case body. A placement chamber configured to place a hand warmer unit for charging is provided on the case body. The case body is provided with a first circuit board, a first charging unit, and a first battery. The first battery and the first charging unit are electrically connected to the first circuit board. When the hand warmer unit is placed in the placement chamber, the first circuit board is configured to output electric...