ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,491,132, issued on Dec. 9.
"Piston acupressure device for spine massage" was invented by Tae Joong Kim (Hwaseong-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a piston acupressure device for a spinal massage and provides an acupressure operation in an accurate position by ensuring firmly the ascending/descending operation of the piston which ascends/descends by expansion and contraction of the airbag and the movement phenomenon in the forward direction can be prevented during the ascending operation of the piston, damage, noise, and vibration caused by friction caused by parts interference caused by the u...