The present invention relates to a system and method for moving samples, such as fluid, within a microfluidic system using a plurality of gas actuators for applying pressure at different locations within the microfluidic. The system includes a substrate which forms a fluid network through which fluid...http://www.google.com/patents/US7323140?utm_source=gb-gplus-sharePatent US7323140 - Moving microdroplets in a microfluidic device