ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,806, issued on March 18, was assigned to 4B DREAM Co. LTD. (Jangseong-gun, South Korea).
"Underwater air tacker" was invented by Kwan Huo (Gwangju, South Korea), Jung Jae Cho (Gwangju, South Korea) and Sang Jeong (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "An underwater air tacker (T) according to the present invention comprises: a water infiltration prevention means (1) which prevents water from infiltrating into a hammer operating means (100); an exhaust cover (2) preventing the water from flowing in; a compressed air discharge valve (3) preventing the water from flowing in; and a piston front-air discharge means (4). Accor...