Any invention or utility model for which a patent right is to be granted shall meet the requirements of novelty, inventiveness and practical use. Discover how the patent system works in China.Proof of patent infringement or damages. ○ No US-style discovery procedures;. Generally, an exclusive licensee is allowed to file a patent infringement lawsuit alone. Patent infringement is typically established through literal infringement or the doctrine of equivalents. An invention patent is similar to a utility patent in the United States. China and 2,720 for the US. Numerous nonChinese entities seek patents in China, and allegations of infringement are not uncommon. Equivalence infringement, or the doctrine of equivalence, was officially introduced into Chinese patent law legislation in 2009.