 SANTA FE, NM ACCESSWIRE March 12, 2021 Sigma Labs, Inc. NASDAQ:SGLB Sigma Labs, a leading developer of quality assurance software for the commercial 3D metal printing industry, will present at the Investor Summit Q1 Virtual Summit being held virtually and will take place on March 23-25, 2021. Sigma Labs President and Chief Executive Officer Mark Ruport will host a virtual presentation during the conference and participate in one-on-one meetings, where he will discuss the Companys 2020 achievements and 2021 industry outlook, milestones and objectives. 