US Patent 7597496 Scent activated, memory enhancing memory stick system

A highlighter marker with a unique scent. The marker is used to highlight printed or written textual material. During the highlighting event, the unique scent evaporates from the ink. A memory link is thereby established between the unique scent and the highlighting event. Subsequently, when the cap of the highlighter marker is opened, the unique scent of the highlighter ink is detected, triggering recall of the highlighted text. A memory aid is thereby provided, which enhances the remembrance of previously highlighted material.