Sigma Labs Inc (SASI)

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Optomec partners with GE Aviation, Lockheed Martin, Rolls-Royce and others on $4M effort.

Laser engineered net shaping (LENS)
Albuquerque-based additive manufacturing specialist Optomec is to head up a 23-partner team working on new ways of repairing aerospace components for the US Air Force.

Under a $4 million public-private contract awarded through “America Makes”, i.e. the US National Additive Manufacturing Innovation Institute, it will apply a laser technique initially developed at Sandia National Laboratories for metal repairs.
Later in the article:
They are aiming to develop a set of specifications and a knowledge base of best practices for additive manufacturing methods to repair metal aerospace components, for example defining the optimum powder feedstock characteristics, **improving process monitoring and control** and creating recommendations for part repairs and applications specifically for the US Air Force.

http://optics.org/news/5/6/35