ClearSign Combustion Corporation designs and develops technologies to enhance emission and operational performance, energy efficiency, and overall cost-effectiveness of combustion systems in the United States. Its Duplex, Duplex Plug & Play, and Electrodynamic Combustion Control platform technologies enhance the performance of combustion systems in a range of markets, including energy, commercial/industrial boiler, chemical, petrochemical, and power industries. ClearSign Combustion Corporation was founded in 2008 and is headquartered in Seattle, Washington.