| Business | Phone |
| Sigma Security Svc 114 S Washington St, Hinsdale 60521 | (630) 789-1993 |
| Surin-Westerman Ltd 120 E Ogden Ave 24, Hinsdale 60521 | (630) 986-1616 |
| Thomas W Smith 222 W 3rd St, Hinsdale 60521 | (630) 325-3127 |
| Varcotronix Inc 240 E Ogden Ave, Hinsdale 60521 | (630) 655-0001 |