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Motorola Radio's Chirp Can't Be Trademarked: USPTO

By Ryan Davis (March 18, 2008, 12:00 AM EDT) -- Motorola Inc.'s attempt to trademark a sound made by its two-way radios has been turned back by the U.S. Patent and Trademark Office, which agreed with arguments made by Motorola's competitor Nextel Communications Inc. that the sound does not function as a mark....

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