China Blocks US Patent Official From Leaving Mainland Days After 'Exit Ban' On Wells Fargo Executive, Beijing Says It's Lawful

Chinese authorities have barred a U.S. Department of Commerce employee from leaving the country, deepening concerns over the use of exit bans on American citizens. What Happened: The unnamed U.S. Patent and Trademark Office staffer was stopped in Chengdu on April 14 while visiting family, reveals…