ALEXANDRIA, Va., June 6 -- United States Patent no. 12,280,478, issued on April 22, was assigned to TRIPLE WIN TECHNOLOGY(SHENZHEN) Co. LTD. (Shenzhen, China).
"Broken pipe extraction device" was invented by Song-Hao Liu (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A broken pipe extraction device includes first, second, and third pressure plates, a fixing member, a fastening member, and a needle. The first pressure plate includes a first perforation and a second perforation connected to the first perforation. The second perforation passes through a side wall of the first pressure plate. The second pressure plate faces the first pressure plate. Projecting portions of the first perforation a...