U.S. Patent Awarded to Sigma Labs Broadens Protection of PrintRite3D
Sigma Labs, Inc. (NASDAQ: SGLB), a provider of quality assurance software under the PrintRite3D brand, announced that the U.S. Patent and Trademark Office has issued a Notice of Allowance for U.S. Patent Application No. 15/276,452, “Optical Manufacturing Process Sensing and Status Indication System.”