US Patent 3,990,481 (Martin Graf, assigned to Grob & Co., Horgen, Switzerland; granted 9 November 1976) describes a wear-resistant leno heddle with a doup and two lifting heddles. The lifting heddles are moulded in one piece from plastic with varying cross-sections, and may contain embedded metal reinforcing inserts. The scan includes a 2002 web printout of the patent text and the original printed patent with drawings (Figs. 1-6), background on steel welded heddles, and 12 claims.