On September 28, 2006, Justin C. King et al. applied for a patent entitled "Foldable tag with expandable loop" (Publication No.: US7836622B1), describing a foldable tag comprising multiple fold segments and an expandable loop.
In November 2024, Packaging Technology Co., Ltd. applied for a patent entitled "A foldable tag and its forming process and usage method" (Publication No.: CN119058222A), aiming to reduce the probability of accidental tag unfolding and increase interactivity.