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The Obsidian Companies launches Obsidian Exchange in the Bitcoin and Personal Finance market segment during DEMO Fall 2014 at the San Jose Convention Center in San Jose, California, on Thursday, November 20, 2014. The Obsidian Companies are trading platforms for bitcoin and other digital currencies. For more information on The Obsidian Companies please visit bit.ly/ObsidianCo. Complete coverage of DEMO, New Tech Solving Big Problems, can be found at bit.ly/DEMOsite. Photo by Stephen Brashear (www.stephenbrashear.com)

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