ClearSign Announces Collaborative Agreement with ASHCOR to Develop, Manufacture and Market Flares

SEATTLE, June 18, 2019 -- ClearSign Combustion Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion technologies that improve energy and operational efficiencies while dramatically reducing emissions, today announces that the Company has entered into a collaborative agreement with ASHCOR with the goal of developing and growing the Company's business in the flare/incinerator