| The 
				study found U.S. 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 U.S. 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.
 
 U.S. President Donald Trump has accused China of stealing 
				American innovations and technology and has slapped trade 
				tariffs on $234 billion of Chinese goods to punish Beijing.
 
 China said in December it resolutely opposed "slanderous" 
				accusations from the United States and other allies criticizing 
				China for economic espionage and stealing intellectual property 
				and company secrets.
 
 Gurry acknowledged there were accusations about China's behavior 
				but there was no doubt it had embraced the global intellectual 
				property system, with the world's largest patent office and the 
				largest number of domestic patent applications.
 
 "They are serious players in the field of intellectual 
				property," he said.
 
 The WIPO study analyzed international patent filings, scientific 
				publications, litigation filings and acquisition activity, and 
				found there had been as many patent applications for AI since 
				2013 as in the half century since the term was coined in the 
				1950s.
 
 Patent applications in machine learning, which includes 
				techniques used by ride-sharing services to minimize detours, 
				averaged annual growth of 28 percent between 2013 and 2016, the 
				last year for which data is available, because of an 18-month 
				period before confidential applications are publicly disclosed.
 
 Much of that growth came from deep learning, which overtook 
				robotics as it ballooned from 118 patent applications in 2013 to 
				2,399 in 2016.
 
 The single most popular AI application was computer vision, used 
				in self-driving cars, and mentioned in 49 percent of all 
				AI-related patents.
 
 The study showed how technology had followed science, Gurry 
				said, with the 2013 boom in technological applications coming 10 
				years after a similar surge in scientific publications.
 
 However, the world did not have any reliable way of measuring 
				the quality of patent applications.
 
 "If you did, you wouldn't need a venture capital industry," he 
				said.
 
 (Reporting by Tom Miles, Editing by William Maclean)
 
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