NEW YORK (Reuters) – Research In Motion Ltd on Wednesday unveiled the long-delayed line of smartphones it hopes will put it on the comeback trail, but it disappointed investors by saying U.S. sales of its all-new BlackBerry 10 devices will not start until March, sending its share price tumbling 12 percent. Chief Executive Thorsten Heins also announced that RIM was abandoning the name it has used since its inception in 1985 to take the name of its signature product, signaling his hopes for a fresh start for the company that pioneered on-your-hip email. …

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RIM rebrands as BlackBerry; launches nifty new devices