A microfluidic valve device includes a microfluidic chip including a substrate having a channel, a valve disposed within the channel and configured to change a conductance of the channel, with the valve having an inner channel formed therein, and an oscillator configured to generate a traveling wave....http://www.google.fr/patents/US8071057?utm_source=gb-gplus-shareBrevet US8071057 - Microfluidic device
