| Business | Phone |
| Icon Inc 30 N Michigan Ave 529, Chicago 60602 | (312) 236-7320 |
| Karl Lambrecht Corp 4204 N Lincoln Ave, Chicago 60618 | (773) 472-5442 |
| Phillips Magnification 11102 S Artesian Ave, Chicago 60655 | (773) 881-8581 |
| Reading Systems 2931 W Catalpa Ave, Chicago 60625 | (773) 561-0068 |