ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,723,684, issued on Sept. 1, was assigned to METAL ONE Corp. (Tokyo).
"Steel pipe joint structure and method for processing steel pipe" was invented by Teruaki Suzuki (Tokyo), Masatsugu Nishi (Tokyo), Nobuhide Sato (Tokyo), Kenzo Urabe (Tokyo) and Tomonori Inoue (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A steel pipe joint structure connects a first steel pipe and a second steel pipe with each other, the first steel pipe having an external thread, the second steel pipe having an internal thread, wherein the first steel pipe has the external thread, and the second steel pipe has the internal thread. The external thread part includes a pin front...