ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,449,160, issued on Oct. 21.
"Method of manufacturing heat exchanger pipe" was invented by Sung-Hwan Choi (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a heat exchanger pipe enabling heat exchange between fluid flowing through the pipe and fluid existing outside the pipe, and a method of manufacturing the heat exchanger pipe. In particular, the present invention relates to a heat exchanger pipe that improves a heat exchange rate by making flow of fluid through the pipe more active and increasing a contact amount, that has an improved contact characteristic and a sealing characteristic between an outer...