National Sign is a full service sign fabrication company and supplier, which provides design, manufacturing, installation and maintenance of sign programs for local, regional and national clients. The company constructs and maintains a wide variety of different signage options on behalf of clients, from simple marquee banners to more complex and elaborate lit signs. You can find the National Sign shop in a nondescript shopping plaza on Ulmerton Road, just a mile or so east of US-19 in Clearwater.