ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,722,400, issued on Sept. 1, was assigned to Jianjun Huang (Guangzhou, China).

"Portable thermal printing device" was invented by Wenlong Zhang (Guangzhou, China) and Jianjun Huang (Guangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a portable thermal printing device including: a support plate assembly; a heat insulation plate disposed on the support plate assembly; and a heating plate disposed on the heat insulation plate and including a uniform heating plate body, a covering layer, and a heating element disposed between the uniform heating plate body and the covering layer; and an electrical connection element detachably connec...