Sigma Labs, Inc. announced that it has signed a commercial agreement with Pratt & Whitney, a unit of United Technologies Corp. for its PrintRite3D® software along with participation in the Company’s Early Adopter Program. Begun last year, the Early Adopter Program has served to accelerate use of Sigma Labs’ PrintRite3D® quality assurance applications for 3D printing; participants include Siemens, Spartacus3D, Woodward, Additive Industries, and Pratt & Whitney.