Doty & Sons Concrete Products Manufacturing, Industry, Distribution Doty & Sons Concrete Products Visit Website 1275 East State Street Sycamore, IL 60178 (815) 895-2884 (815) 895-8035 (fax) Facebook About About Quality Concrete Products Since 1948. Items in our Product Line Include: Concrete Benches, Concrete Tables, Concrete Waste Receptacles, Concrete Recycling Receptacles, Concrete Planters, and Concrete Bollards.