1. Switchboard Apparatus Inc
618 W Lamont Rd, Elmhurst, IL 60126
Coordinate: 41.92908,-87.96324
Phone: (708) 450-0990
2. Chicago Switchboard Co Inc
470 W Wrightwood Ave, Elmhurst, IL 60126
Coordinate: 41.92452,-87.95703
Phone: (630) 833-2266
3. Simplex System Controls
Coordinate: icon:https://i1.ypcdn.com/ypu/images/icons/map-pin.png|41.922295,-87.95561
Phone: Phone: (630) 766-8401