ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,557,885, issued on Feb. 24.
"Ear piercing instrument" was invented by Bo Cheng (Nanchang, China) and Xiaoping Cheng (Beijing).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ear piercing instrument, including: a base housing on which a first mounting cavity extending parallel to a stud piercing direction is provided; and an integrally molded stud piercing housing which is configured to assemble a stud assembly or a stud and fixedly connected in the first mounting cavity by a third snap. The stud piercing housing is provided with a push rod guiding cylinder embedded in the first mounting cavity, and a piercing assembly is at least partially located in t...