John O. Butler (dentistry)
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Dr. John O. Butler was a dentist and periodontist in Chicago, Illinois, and founder of the John O. Butler Company, manufacturer of toothbrushes, dental floss, and sundry oral-care products under the Butler and GUM brand names. The company was purchased in 1988 by Sunstar, Inc., a major Japanese manufacturer of personal care products, and in 2006 the John O. Butler Company adopted the name of its parent company, although the brand names Butler and GUM are still in use.
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