There is no patent application agency in Zhangjiakou. I am the patent agent of Shenzhen Xingkeda Intellectual Property Agency Co., Ltd. If you want to ask questions about patent application, we can answer them for you. Nowadays, communication is convenient and fast, and many patent applications are processed through the network.
My contact information is:
E-mail: duqigang@ 163.com
Tel: 0755-86116996-815.
dugong