ClearSign Combustion Corp. engages in the design and development of technologies for the combustion systems. Its product Duplex technology focuses on the performance enhancement of combustion systems in a broad range of markets, including the energy, commercial and industrial boiler, chemical, petrochemical, and power industries. The company was founded by Richard F. Rutkowski, David B. Goodson, and Geoffrey D. Osler on January 23, 2008 and is headquartered in Seattle, WA.