LiqTech International, Inc. to Ring the Nasdaq Stock Market Closing Bell on April 17, 2019 PR Newswire BALLERUP, Denmark, April 15, 2019 BALLERUP, Denmark , April 15, 2019 /PRNewswire/ -- LiqTech International, Inc. (NYSE AMERICAN: LIQT) ("LiqTech"), a clean technology company that manufactures and markets highly specialized filtration technologies, today announced that President and CEO Sune Mathiesen , and other team members, will ring the Closing Bell of the Nasdaq Stock Market on Wednesday,...