ClearSign Technologies Corporation Announces First Quarter 2021 Conference Call and Virtual Annual Meeting Hosting Call at 5pm ET (2pm PT) on Tuesday, June 15, 2021 Virtual Annual Meeting at 5pm ET (2pm PT) on Thursday, June 17, 2021 News provided by Share this article Share this article SEATTLE, May 13, 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, June 15, 2021 the Company will host a conference call at 5:00 PM ET. The Company will file its quarterly report on form 10-Q with the SEC in the coming days and will issue a summary of its financial and operating results for the quarter ending March 31