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Keywords: US Patent and Trademark Image for Eco-friendly dentistry.jpeg Uploaded with en wp UW marker 2012 12 04 Copy of the US Patent and Trademark for the term Eco-friendly dentistry United States Patent and Trademark Office 2009-12-22 United States Patent and Trademark Office ;Other information It's a copy of a patent and trademark related to eco-friendly dentistry PD-USGov Uncategorized 2015 April 27 |