ALEXANDRIA, Va., March 3 -- United States Patent no. 12,565,722, issued on March 3, was assigned to MUELLER TEXTIL GMBH (Wiehl-Drabenderhoehe, Germany).
"Spacer fabric" was invented by Stefan Mueller (Wiehl, Germany) and Ruth Neumeier (Overath, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A spacer fabric has a first flat warp-knitted fabric layer having openings each formed by a respective plurality of stitches and a second flat warp-knitted fabric layer also having openings that are each formed by a respective plurality of stitches. The second warp-knitted fabric layer further has at least a first yarn system and a second yarn system and yarns of the first yarn system run in a production direction...