US, China lead race for artificial intelligence patents: UN

China and the United States are ahead of the global competition to dominate artificial intelligence (AI), according to a study by the United Nations World Intellectual Property Organization (WIPO) published on Thursday. The research found tech giant IBM had by far the biggest AI patent portfolio with 8,920 patents, ahead of Microsoft with 5,930, and a group of mainly Japanese tech conglomerates. China accounted for 17 of the top 20 academic institutions involved in patenting AI and was particularly strong in the fast-growing area of "deep learning" - a machine-learning technique that includes speech recognition systems. "The US and China obviously have stolen a lead. They're out in front in this area in terms of numbers of applications and in scientific publications," WIPO Director-General Francis Gurry told a news conference.