The database contains 5,377,576 (as of October 2011) Chinese patents after 1985. It covers patents of invention, utility, and design. The database is invaluable for patent information retrieval, patent application, research and design, and product development.
The Chinese State Intellectual Property Office (SIPO) has made the Chinese Patents free searchable and downloable with user interefaces in both English and Chinese at www.cnpat.com.cn. While downloading a patent yourself may be cumbersome, document delivery services through specialists would be a hassle free option.
Those who subscribe to a Chinese patents database from other sources might find the above information useful. Beside being free, the official database is actually the most updated.
Click here to start a search for Chinese patents
