經安全檢測,此網站為安全網站,請放心前往原始網址!

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

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 ...

en.wikipedia.org

網址安全性掃描由 google 提供