Texas Corporation Agrees Contract to Retrofit Roof Wind Turbines for 90 Thousand Sq-Ft Storehouse. BUILDING TURBINES INC. (PINKSHEETS: B L DW) Works on the Study and Construction of Copyrighted Rooftop Wind Turbines. Buy it at: $0.038 Target Price: $0.45 Name: Building Turbines Inc Trading Date: Mon, August 5th, 2013 Trade: B L DW Environment Friendly Energy Corporation Ripe To Lift Off Next Week.