ClearSign Technologies Corp — Director's Dealing 2012

May 1, 2012

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: CLEARSIGN COMBUSTION CORP (CLIR)
CIK: 0001434524
Period of Report: 2012-04-24

Reporting Person: MARLETT CHRISTOPHER A (10% Owner)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	74573	Direct
Common Stock	454545	Indirect
Common Stock	289207	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Common Stock Warrants	$2.20	2016-05-10	Common Stock (17409)		Direct
Common Stock Warrants	$2.20	2016-05-10	Common Stock (74318)		Indirect
Common Stock Warrants	$5.00	2017-04-24	Common Stock (300000)		Indirect

Footnotes

F1: The record holder of these securities is Integrated Surgical Systems, Inc. ("ISS"). The reporting person is the Chief Executive Officer and a director of ISS. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

F2: The record holder of these securities is MDB Capital Group LLC ("MDB"). The reporting person is the Chief Executive Officer of MDB. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.