C3D's product lines including but not limited to C3D Interactive, C3D Studio and C3D Planner contain a 3D visualization engine which uses methods protected under U.S. Patent 8,725,466.

For more information about this patent granted to CCT International on May 13, 2014 please visit: http://www.google.com/patents/US8725466

You can also view the official press release which contains a brief presentation of the invention: http://www.cctintl.com/news/cct-international-granted-us-patent-hybrid-solid-surface-modeling-cad-environments-0

International Patents pending.