position：
Resources
1. World Intellectual Property Organization
3. European Patent Office
5. Japan Patent Office
7. Intellectual Property Office of Canada
9. Taiwan Smart Property Office
2. U.S. Patent and Trademark Office
4. State Intellectual Property Office of China
6. Korea Intellectual Property Office
8. Australian Intellectual Property Office
Patentscope PCT Application Search
Espacenet global patent search
US Patent Search
