However, Nokia's idea stands out for seeking to enhance touch feedback by permanently, or at least semi-permanently, marking the users' body。

"Our research suggests that once a user become accustomed to haptic feedback on a phone or tablet screen, other devices that don't offer it can feel 'dead'," Marek Pawlowski, editorial director at the mobile industry research firm PMN told the BBC。

"Nokia's patent suggests that their magnetic mark could be invisible - which might make this appealing to some. But in the immediate term I think users would draw the line at anything that is invasive like a tattoo or would be seen to have potential medical effects."

A spokeswoman for Nokia was unable to confirm whether Nokia intended to follow up its patent application with further research。

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