ClearSign Technologies Corporation (NASDAQ:CLIR) Q1 2020 Results Conference Call June 16, 2020 5:00 PM ET Company Participants Matthew Selinger - Investor Relations Jim Deller - President and Chief Executive Officer Brian Fike - Chief Financial Officer Rob Hoffman - Chairman of the Board Conference Call Participants Jim Kennedy - Marathon Capital Robert Kecseg - Las Colinas Capital Management Michael Legg - Benchmark Operator Good day, and welcome to the ClearSign Technologies Corporation First Quarter 2020 ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ______________ to _______________ Commission File Number 001-35521 CLEARSIGN TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) W ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ______________ to _______________ Commission file number 001-35521 CLEARSIGN TECHNOLOGIES CORPORATION (Exact name of registrant as specified in its charter) WASHIN ...

ClearSign Technologies Corporation (NASDAQ:CLIR) Q4 2019 Earnings Conference Call March 12, 2020 5:00 PM ET Company Participants Matthew Selinger - Investor Relations Jim Deller - President & Chief Executive Officer Brian Fike - Chief Financial Officer Conference Call Participants Operator Good day and welcome to the ClearSign Technologies' Fourth Quarter and Full Year 2019 Conference call. All participants will be in listen-only mode. [Operator Instructions] After today's presentation, there will be an opp ...

ClearSign Combustion Corporation (NASDAQ:CLIR) Q3 2019 Earnings Conference Call November 13, 2019 5:00 PM ET Company Participants Matthew Selinger - IR Brian Fike - CFO Jim Deller - CEO Rob Hoffman - Chairman of the Board Conference Call Participants Robert Kecseg - Las Colinas Capital Operator Good afternoon, and welcome to the ClearSign Technologies' Third Quarter 2019 Results Conference Call. [Operator Instructions] After today's presentation, there will be an opportunity to ask questions. [Operator Inst ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock CLIR The Nasdaq Stock Market LLC FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ______________ to __________ ...

ClearSign Combustion Corporation (NASDAQ:CLIR) Q2 2019 Results Earnings Conference Call August 14, 2019 5:00 PM ET Company Participants Matthew Selinger - IR Rob Hoffman - Chairman of the Board Jim Deller - CEO Brian Fike - CFO Conference Call Participants Robert Kecseg - Las Colinas Capital Operator Good afternoon, and welcome to the ClearSign Corporation Second Quarter 2019 Conference Call. [Operator Instructions] After today's presentation, there will be an opportunity to ask questions. [Operator Instru ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock CLIR The Nasdaq Stock Market LLC FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ______________ to _______________ ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ______________ to _______________ Commission File Number 001-35521 CLEARSIGN COMBUSTION CORPORATION (Exact name of registrant as specified in its charter) WAS ...

ClearSign Combustion Corporation (NASDAQ:CLIR) Q1 2019 Earnings Conference Call May 8, 2019 5:00 PM ET Company Participants Matthew Selinger - Investor Relations Rob Hoffman - Chairman of the Board Jim Deller - Chief Executive Officer Brian Fike - Chief Financial Officer Conference Call Participants Robert Kecseg - Las Colinas Capital Management. Operator Good afternoon, and welcome to the ClearSign Combustion First Quarter 2019 Conference Call. All participants will be in listen-only mode. [Operator Instru ...