Beijing, China Download Vcard View Profile 15th Jun 2018 Dr Xiangtong XuSenior Patent AttorneyPat SF, Patents: Engineering & ICT +86 10 8225 5655 [email protected] Xiangtong is a Patent Attorney at Beijing Pat SF Intellectual Property Agency Co Ltd (PAT SF).Xiangtong is a Patent Attorney at Beijing Pat SF Intellectual Property Agency Co Ltd (PAT SF). Read More