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10-Q/A

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ClearSign Technologies Corp Filed 2021-12-23 Acc 0001104659-21-153166

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10-Q/A , tm2136159d2_10qa.htm

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2021-12-23 CORRESP Correspondence Between Filers and SEC Staff
2021-12-23 10-Q/A 10-Q/A
2021-12-23 10-Q/A 10-Q/A
2021-12-16 UPLOAD SEC-generated Letter

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