TULSA, Okla., April 23, 2024 /PRNewswire/ -- 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 provides an update on operations for the year ended December 31, 2023. "We ended 2023 with some commercial momentum and that has carried into the current year," said Jim Deller, Ph.D., Chief Executive Officer of Clea ...