China extends lead over US for international patent applications

China, which last year overtook the United States as the world’s top filer of international patents – a key measure of technical innovation – increased its lead significantly in 2020, the United Nations said on Tuesday.Even as Covid-19 took a vast human and economic toll, international patent applications continued to grow strongly, with China leading strong gains from Asia.A record 275,900 international patents were filed in the year, marking a 4 per cent increase from 2019, the UN’s World…