The US on Thursday revoked duty-free concessions on import of at least 50 Indian products, mostly from handloom and agriculture sectors, reflecting the Trump administration's tough stand on trade-related issues with New Delhi. The federal register issued a notification, listing out 90 products which were so far subject to duty-free provisions under the Generalized System of Preferences (GSP). President Donald Trump issued a presidential proclamation on Tuesday, leading to the removal of these products from the privilege beginning November 1.