US Patent 1,666,686, granted 17 April 1928 to Lester B. Chisholm of Melrose, Massachusetts, assignor to Everlastix, Inc. It describes a non-slipping woven fabric in which parallel rubber strands are bound into a two-ply backing at staggered intervals, forming raised, crowded loops (bights) that give a rough, chainlike rib texture. The patent includes drawings (plan, cross-sections and a perspective view), a description of weaving tension, and five claims.