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| - polymer, and filtering materials such as activated carbon, used for the removal, reduction or adsorption of impurities in liquids and gases, most notably water and airUS7438799 *Oct 7, 2005Oct 21, 2008Headwaters R & D, Inc.Portable, refillable water dispenser serving batches of water purified of organic and inorganic pollutantsUS7487677Dec 22, 2004Feb 10, 2009Fook Tin Technologies Ltd.Apparatus a
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