Nokia is working on a magnetic tattoo ink that would alert cell phone users when they have a phone call, text, or email, by vibrating under your skin.
Smartphone owners could specify their mobile devices to send out patterns of magnetic pulses as shorthand Morse code for different phone alerts, according to the Nokia patent filing. A series of short, strong pulses might let the owner know about messages from a certain friends, while a weaker series of long pulses might signal that the phone's battery is running low.
This latest example of haptic feedback technology — based on the sense of touch — also represents another way of connecting human bodies to everyday gadgets.
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