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One smartring to rule all as startups join new wave of wearable technology

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Move over, Frodo. A Japanese startup is designing a smartring to lord over other gadgets. Trace a dollar sign in the air and pay for your coffee. Write “TV” with your finger and your television set turns on. Charge a subway fare. These are just a few of the applications envisioned by Logbar Inc., the Tokyo-based startup developing the device scheduled for release this year. While Apple Inc. and...

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