A solid freeform fabrication process and apparatus for making a three-dimensional object. The process comprises the steps of (1) positioning a material deposition sub-system a selected distance from a target surface, (2) operating this sub-system to deposit materials onto the target surface by carrying...http://www.google.com.au/patents/US6401001?utm_source=gb-gplus-sharePatent US6401001 - Layer manufacturing using deposition of fused droplets
