ClearSign Technologies Corporation Provides Fourth Quarter and Full Year 2025 Update

Achieves Record Quarterly Revenue of $3.7 MillionAnnual Revenue Up 44% to Record $5.2 Million TULSA, OK / ACCESS Newswire / April 9, 2026 / ClearSign Technologies Corporation (Nasdaq:CLIR) ("ClearSign" or the "Company"), a leader in advanced …