AM Press ReleasesAM SoftwarePatents

U.S. patent awarded to Sigma Labs broadens protection of PrintRite3D

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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.”

The patent application covers a system of sensors configured to measure optical emissions generated by a
scanning heat source during an additive manufacturing process and to analyze the data collected.

John Rice, CEO of Sigma Labs, said, “This patent allowance further enhances the depth and breadth of
the patented intellectual property portfolio covering our PrintRite3D platform. The technology
covered in this patent enables Sigma to provide valuable and relevant quality status information to
customers requiring high-quality AM metal products production. The USPTO has now allowed four
patents pertaining to Sigma Lab’s PrintRite3D platform, representing a wide degree of innovation and
distinguishing us as a leader in this space. Additionally, there are eighteen more patents-pending in
process.”

Sigma Labs patent

Mr. Rice concluded, “Sigma’s patent portfolio, our newly launched platform, and our recently signed
agreements cumulatively represent what we believe is a formidable and valuable initiative through
which we can more easily work with customers that need to secure a greater measure of repeatable
high-quality yields and efficiency in the serial AM production of metal components.”

Last month, Sigma Labs announced it was awarded a Test and Evaluation Program contract with a leading global materials and service provider in additive manufacturing. This program demonstrates the value of Sigma’s PrintRite3D product capabilities and performance.

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