 SEATTLE, March 11, 2021 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, announces that on Tuesday, March 23, 2021 the Company will issue a press release disclosing its financial and operational results for the quarter ended December 31, 2020 and host a conference call at 5:00 PM ET. Following this, the Company will file its annual report on form 10-K with the SEC in the coming weeks. 