Sigma Labs Receives Contract From Alcoa for Advanced Manufacturing Process Development

Sigma Labs, Inc. SANTA FE, N.M., Aug. 3, 2011 -- /PRNewswire/ -- Sigma Labs, Inc. (OTCBB: SGLB.OB). Sigma Labs, Inc. announced today that it received a contract from Alcoa, Inc. (NYSE: AA) to demonstrate the feasibility of applying Sigma Labs'...