ClearSign Technologies Provides Update on China Business

TULSA, February 15, 2022 -- ClearSign Technologies Corporation (Nasdaq: CLIR) ("ClearSign" or the "Company"), an emerging leader in industrial combustion and sensing technologies that improve energy, operational efficiency and safety while dramatically reducing emissions, today provided an update on commercialization progress for its products in China.   The Company’s 125hp fire tube boiler, which received