- Dahlstrom Display Inc. (DDI)
 - Manufacturer of large format signs. - Impact! Signs Chicago
- Makes and installs architectural signs, banners, vehicle graphics, neon and LED signs, and corporate and retail signage.
- Materiel Graphics
- Making signs from wood, metal, or plastic.
- Nelson-Harkins Industries
- Manufacturer of directories and bulletin boards.
- Specialty Graphics Supply
- Specialising in sign vinyl cutters/plotters, heat transfer presses, vinyl graphic films, and other sign and graphic supplies.
- Electronic Signs
- Neon Design, Inc.
- Manufactures, sells, and installs neon, cold cathode, and fibre optic lighting.
- Outdoor Advertising@
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