File photo shows high-speed rail in China. [Photo / Xinhua]

Chinese innovators filed most of their 2015 applications in electrical engineering, which includes telecoms, followed by computer technology and semiconductors, and measurement instruments, including medical technology, the UN agency said.

"The figures for China are quite extraordinary. It is the first patent office in the world to receive more than 1 million applications," WIPO director-general Francis Gurry told a news briefing to launch its report, "World Intellectual Property Indicators".

The bulk of China's 1.01 million applications were for domestic protection in patents, trademarks and industrial design, with only some 42,154 filed abroad, he said.

But there is a "slow and gradual" increase in China's applications for international patents, Gurry said. "They are in process of making innovation a central point of their economic strategy."

"Once again we see an increasing dominance almost by Asia as the origin of filing activity for intellectual property. If you look at the figures, you see 62 percent of global filing activity for patents is located in Asia, 55 of global activity in trademarks is located in Asia and 68 percent of design applications are in Asia," he added.

Worldwide, some 2.9 million patent applications were filed last year, a 7.8 percent increase over 2014, WIPO said. Roughly two in three patents are ultimately approved, Gurry said.

The United States ranked second last year with 526,296 patent applications, followed by Japan at 454,285 and South Korea with 238,015.

Gurry was asked about protectionist remarks by US President-elect Donald Trump, who has announced he would kill an ambitious regional trade pact, the Trans Pacific Partnership (TPP), and consequences for innovation. Gurry said there had been no general policy statement on innovation thusfar.

"In respect of the trade element, what we can say is that the United States remains clearly the biggest filer of applications externally (abroad). So this obviously is related to trade and investment," he said.

"So they have important stakes, very important stakes in intellectual property and trade."