ClearSign designs, develops and markets technologies that aim to improve the key performance characteristics of combustion systems, including emission, operational performance, energy efficiency and overall cost effectiveness.
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Year
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| Form | Description | Date | Format |
|---|---|---|---|
| RW | Withdrawal of registration statement filed under the Securities Act | Dec 6, 2017 |     |
| SC 13D/A | Amendment to a SC 13D filing | Mar 14, 2017 | |
| SC 13D/A | Amendment to a SC 13D filing | Mar 8, 2017 | |