Industry sector: Oil and gas

Headquarters: Beijing

PetroChina, the country’s largest oil producer, emerged from the 1999 restructuring of the state-owned China National Petroleum Corporation. A prolific filer of both domestic and PCT applications, it aims to have built an IP arsenal some 20,000 patents strong by 2015. Numerous advances in discovery and oil and gas systems technology have boosted its profile internationally; as the company ramps up its already substantial R&D capabilities, its stature on the global market should only increase.