Marks & Clerk Double click to activate the map Patent offices established in the Grand Duchy of Luxembourg Marks & Clerk 44, rue de la Vallée L-2661 Luxembourg Luxembourg Postal address :BP 1775 - L-1017 Luxembourg Phone : (+352) 40 02 70 (+352) 40 02 70 luxembourg@marks-clerk.com Marks & Clerk Path to Marks & Clerk Show on map