Oprah Winfrey Files Suit Against Dietary Supplement Firms by Mike Hughlett Alleging Internet marketers are using her name without permission, Oprah Winfrey–through her corporate vehicle, Harpo Inc.–on Wednesday filed a federal trademark infringement suit against 40 peddlers of dietary supplements. And the talk show star–or at least her people–aided an investigation by Illinois Atty. Gen. [...]

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