united states patent and trademark office的相關公司資訊
United States Patent and Trademark Office - Wikipedia, the free encyclopedia

United States Patent and Trademark Office - Wikipedia, the free encyclopedia

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日期:2024-11-14
The United States Patent and Trademark Office (PTO or USPTO) is an agency in the U.S. Department of Commerce that issues patents to inventors and businesses for their inventions, and trademark registration for product ......看更多