SAN JOSE, Calif.--(BUSINESS WIRE)--More than 600 commercial drone end users representing 17 countries have already registered for Drone World Expo. Attendees include representatives from Bell Fuels, Inc., Bowles Farming Company, Inc., City of San Francisco, City of Sioux City, Collins Electrical Co., Inc., Department of Fish & Wildlife - OSPR, Farmers Insurance Group, FOX Sports Media Group, Grimmway Farms, Guida Surveying, ILS Farm Partnership, Kinder Morgan, LA County Fire Department, Mia