Chinese patent attorney (admitted in 2017)
Yajun Duan is mainly involved in preparation and representation regarding technical IP rights concerning mechanical engineering & chemistry. His fields of specialization include drafting and prosecution of patent applications, reexamination and invalidation, patent searches and counseling.
Mr. Duan is highly experienced in handling domestic and international patent cases.
2019 – present Sonderhoff & Einsel (Beijing) Patent Agency Office
2016 – 2019 Jiaquan IP Law
2013－2016 Wuhan University, Master’s degree in Analytical Chemistry
2009－2013 Tangshan Normal College, Bachelor’s degree in Applied Chemistry