Three dimensional printer makers 3D Systems (DDD), Startasys (SSYS) and ExOne (XONE) are advancing after President Obama favorably mentioned the industry in his State of the Union address last night. Also, Proto Labs (PRLB), which operates in a related sector, reported stronger than expected results. In last night's address, President Obama said 3D printing "has the potential to revolutionize the way we make almost everything." Meanwhile, Proto Labs - which manufactures plastic injection molded parts and sells them to developers who use 3D CAD software to design products - reported stronger than expected fourth quarter results. On its earnings conference call the company provided Q1 EPS guidance of 28c-32c, versus analysts' consensus estimate of 30c. 3D CAD software can be used in conjunction with 3D printers and Piper Jaffray analyst Troy Jensen indicated yesterday in a note to investors that Proto Labs is in a related sector to the 3D printer makers. In mid-morning trading, 3D Systems climbed 4.1% to $65.67, Stratasys rose 1.1% to $76.38, ExOne advanced 4.4% to $28.70 and Proto Labs surged 24.6% to $52.32. The Fly notes that 3D Systems and Stratasys fell sharply in yesterday's trading.