Welcome to visit Xi’an Tong Da (Tong Sheng) Patent & Trademark Agency Co., Ltd. !
中文版 | 繁体版 | 日文版 | 加为收藏
| | | | | | | | | |
Patents
Trademarks
Computer Software Copyright
Legal Proceedings & Administrative Mediation
Counsel
Other Services
 
Patents
                         ● Proxy patent applications
                         ● Proxy substantive patent examination procedures
                         ● Maintain patent
                         ● Speed up the process 
                         ● Changes to bibliographic
                         ● Payment of annual fee
                         ● Request for restoration of rights
                         ● Production photos
                         ● Proof of priority, certificates
                         ● Review, invalid request
                         ● Feature, novelty, legal status of search
                         ● International application, PCT, and enter the national phase applications
Patent Search
China Patent Search
U.S. Patent Search
European Patent Search
Japan Patent Search
Legal Status Check
Trademark Search
China Trademark Search
Hong Kong Trademark Search
Britain Trademark Search
U.S. Trademark Search
International Trademark Search
Links
Xi'an Tong Da (Tong Sheng) Patent & Trademark Agency Co., Ltd. All rights reserved PC: 710049
Tel :029-82665112/5113/5360/8964 phone :138-9186-3327(Zhang),138-9192-8636 (Liu) E-mail: zhgzhang@mail.xjtu.edu.cn     You are the first: Visitors