Operational for more than 55 years, Denco Sales Co. is a wholesale supplier of equipment and supplies to manufacturers of signs, digital graphics and screen printing. Based in Denver, Colo., the company offers a comprehensive line of equipment and supplies for electrical signs, commercial signs, screen printing, digital imaging, green products, and many more. The firm has associations with the International Sign Association (ISA), the Specialty Graphic Imaging Association (SGIA), the National Association of Sign Supply Distributors (NASSD), and others.