SC 13D/A | SEC Filings Hub

Filing metadata

Accession number: 0001144204-13-011009
Form type: SC 13D
Filer: CLEARSIGN COMBUSTION CORP
CIK: CIK 1434524
Filed: Feb 25, 2013
Reporting period: Feb 25, 2013
Description: Activist stake

Documents

0001144204-13-011009-index.htm

Complete submission

0001144204-13-011009.txt

directory listing

Filed by

CLEARSIGN COMBUSTION CORP