ALEXANDRIA, Va., March 19 -- United States Patent no. 12,255,478, issued on March 18, was assigned to Shenzhen Tianman Technology Co. Ltd. (Shenzhen, China).
"Hand warmer charging case and handwarmer kit" was invented by Yanan Du (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hand warmer charging case includes an accommodating housing and an accommodating cover. The accommodating housing is provided with a storage space for storing a target hand warmer. The accommodating housing is further provided with an accommodating space. The accommodating space is configured to accommodate a rechargeable power supply and a circuit board matched with the rechargeable power supply. The accommodating co...