CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 revenue for the last year amounted to 3.60 M USD, the most of which — 3.60 M USD — came from its highest performing source at the moment, Combustion Systems, the year earlier bringing 2.40 M USD. The greatest contribution to the revenue figure was made by United States — last year it brought CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 3.60 M USD, and the year before that — 2.40 M USD.