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"Here's what's holding back 3D printing, the technology that's supposed to revolutionize manufacturing and countless other industries: patents. In February 2014, key patents that currently prevent competition in the market for the most advanced and functional 3D printers will expire, says Duann Scott, design evangelist at 3D printing company Shapeways. These patents cover a technology..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://qz.com/106483/3d-printing-will-explode-in-2014-thanks-to-the-expiration-of-key-patents/?goback=.gde_4517509_member_261988413>