China is widening its lead over the United States in the race to develop humanoid robots, with Chinese firms accounting for six of the world’s 10 most innovative start-ups in the sector, according to a new report tracking global patent data, as Washington moves to restrict imports of robots, including those made in China.Firms from China dominated the ranking released by legal research platform LexisNexis on Tuesday, claiming a clean sweep of the top five.The top five places went to...