This was very good news today. Many investors may not realize how process monitoring and controls are important in determining the end product in 3D printing. The news of sensor patent is significant progress. We can possibly deduce that the JDTA with GE is going well. Sigma Labs has researched sensing techniques for many years in multi-sensor monitoring and I'm glad to hear that they have filled for a patent. http://jjsigmalabsblog.blogspot.com/2014/02/p...and_7.html