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U.S. Patent and Trademark Office The U.S. Patent and Trademark Office is the agency responsible for granting U.S. patents and registering trademarks....
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Home page of the United States Patent and Trademark Office's main web site. ... Access Classification Information by Symbol. Select Classification System: CPC....
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2009年7月4日 - Find existing patents, published patent applications and other published patent documentation....
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2015年2月4日 - Information about the U.S. patenting process, including agency organization chart, rules and regulations, FAQs, and online applications....