ClearSign Technologies Corp — Director's Dealing 2012

May 16, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CLEARSIGN COMBUSTION CORP (CLIR)
CIK: 0001434524
Period of Report: 2012-05-15

Reporting Person: MARLETT CHRISTOPHER A (10% Owner)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-15	Common Stock Warrant	$5.00	J	45000	Acquired	2017-04-24	Common Stock (45000)	Indirect

Footnotes

F1: 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.

F2: The securities were acquired by MDB as partial compensation resulting from the exercise of underwriter's over-allotment option in connection with an underwritten public offering.