Successful Start Up of Multi-Burner Heater in California Project

  ClearSign Technologies Corporation Announces Successful Start Up of Multi-Burner Heater in California Project Independent Source Testing Confirms Emissions Levels Below Guarantee     TULSA, Okla., January 17, 2024 -- 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