In this week’s Patent News – China emerges as top patent filer in the world; Enhanced damages of $389 million awarded to Bristol-Myers Squibb; British American Tobacco files patent infringement lawsuit against Philip Morris; WHO Director General supports Costa Rican governments proposal to create an exclusive voluntary IP pool for COVID-19 products and other news updates. PATENT INFRINGEMENT NEWS British American Tobacco files patent infringement suit against Philip Morris British American Tobacco (BAT), the second-largest cigarette and…