ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,447,335, issued on Oct. 21, was assigned to VIOL Co. LTD. (Seongnam-si, South Korea).
"Hand piece for skin treatment apparatus" was invented by Yong Seok Park (Seoul, South Korea) and Suji Lee (Seongnam-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a hand piece for a skin treatment apparatus, the hand piece including: a hand piece body capable of being operated by a user hand; a skin treatment unit connected to an end of the hand piece body, and treating a user skin; a pressure sensing unit installed on the skin treatment unit, and sensing a pressure between the skin and the skin treatment unit; and a pressure display unit e...