ClearSign Announces Private Placement of $1,770,000 Back to the Newsroom ClearSign Announces Private Placement of $1,770,000 At the Market Transaction With Existing Stockholder ClearSign Technologies Corporation designs and develops products and technologies for the purpose of decarbonization and improving key performance characteristics of industrial and commercial systems, including operational performance, energy efficiency, emission reduction, safety, the use of hydrogen as a fuel and overall cost-effec ...