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"We have actually controlled 10, 000 1-800 numbers at one time because that's how we got attribution, " says Renker, 53.
FORBES: Private Companies
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Recently Klum launched an antiaging skin care line, In an Instant, to be hawked through infomercials by marketing giant Guthy-Renker.
FORBES: Magazine Article
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Founded in 1988 by Bill Guthy and Greg Renker, the infomercial company is the largest of its ilk, excluding channels like QVC.
FORBES: Private Companies