HOUSTON--(BUSINESS WIRE)--Changing Technologies, Inc. (OTCBB: CHGT) is currently advising a smartphone accessory manufacturer on the most efficient 3D printing processes and cost-effective materials to use to debut a new line of products. The startup company joins a growing list of consulting clients seeking CHGT’s industry expertise on making profitable use of 3D printing. The accessory maker plans to introduce several aftermarket additions for smart phones and tablets, including attachable el
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