UPDATE: Piper Jaffray Releases Coverage On 3D Printing Sector By: Benzinga via Benzinga July 22, 2014 at 15:53 PM EDT In a report released Tuesday, Piper Jaffray analyst Troy Jensen released coverage on the 3D printing sector. It covered leaders ... Read More >> Related Stocks: 3D Systems Corp Materialise NV ADR Proto Labs Inc Stratasys Ltd Voxeljet Ag ADR