ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,496,437, issued on Dec. 16.
"Tattoo practice device and operation pen using the same" was invented by Tingting Xia (Jiangsu, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A tattoo practice device includes a coloring portion, a connecting portion, and a sleeve. The coloring portion includes at least one coloring rod, and a plurality of coloring rods are arranged in a dot matrix. One end of the connecting portion is connected to the coloring portion, the connecting portion is linked with the coloring portion, and the sleeve is sleeved on a periphery of the connecting portion. When the connecting portion is driven to move in a first direction along ...