ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,467,572, issued on Nov. 11, was assigned to DAIKIN INDUSTRIES LTD. (Osaka, Japan).

"Pipe joint and manufacturing method of pipe joint" was invented by Hayato Tsuda (Osaka, Japan), Tadaharu Isaka (Osaka, Japan), Yumi Zenke (Osaka, Japan), Yukari Yamamoto (Osaka, Japan), Yasuyuki Yamaguchi (Osaka, Japan) and Hiroyuki Hamada (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a pipe joint including a cylindrical hollow, wherein the wall thickness of a part having the largest wall thickness of the pipe joint is 2 to 7 mm, the ratio of the length of the hollow in the axial direction (L) to the diameter of the hollow (D), (L/D), is 5 or l...