ALEXANDRIA, Va., July 21 -- United States Patent no. D1,136,130, issued on July 21.
"Heat exchanging pipe" was invented by Haiying Wang (Weifang, China).
The patent was filed on Oct. 18, 2023, under Application No. D/914,479.
*For further information, including images, charts and tables, please visit: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PTXT&s1=D1136130&OS=D1136130&RS=D1136130
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