1. SimplexGrinnell 91 N Mitchell Ct, Addison, IL 60101 Coordinate: 41.92863,-88.03287 Phone: (630) 948-1100
2. Illinois Fire & Safety Company 702 S Rohlwing Rd, Addison, IL 60101 Coordinate: 41.91293,-88.03252 Phone: (630) 629-2413