John Du, – Trademark Portfolio

John Du, specializes in Class 35 (Advertising & Business) trademark filings before the United States Patent and Trademark Office (USPTO), with 5 of 7 total filings concentrated in this category. The practice also covers Class 41 (Education & Entertainment) along with 6 other Nice Classification classes. Filing activity spans from 1999 to 2012. Currently, 0 trademarks are registered.