 SANTA FE, NM ACCESSWIRE March 10, 2022 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 Thursday, March 24, 2022 at 4:30 p.m. Eastern time to discuss its results for the fourth quarter and full year ended December 31, 2021. 