 SANTA FE, NM ACCESSWIRE April 14, 2021 Sigma Labs, Inc. NASDAQ:SGLB Sigma Labs, a leading developer of quality assurance software to the commercial 3D printing industry, will hold a conference call on Tuesday April 26, 2022 at 4:30 p.m. Eastern time to discuss its results for the first quarter ended March 31, 2022. 