Additive manufacturing, also known as 3-D printing, is changing the way many industries operate. In the following video, Fool analyst Rex Moore explains why patent expirations are fueling heavy growth in 3-D printing, and what it means for the future of this technology.

Rex Moore has no position in any stocks mentioned. The Motley Fool recommends and owns shares of 3D Systems and Stratasys and has options on 3D Systems. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.