| 摘要 |
A phosphorescent ring for providing a visual reference cue towards a doorknob or similar opening hardware. The ring may be attached around the doorknob with adhesive, or it may be hung on the doorknob. In the preferred embodiment, the ring is hung on the doorknob, allowing the ring to be used on a motel room door or other location where the room occupant is unfamiliar with the room layout and exit door location.
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