A method and apparatus for separating and concentrating a selected component from a multi-component material. The multi-component material may include a whole sample such as adipose tissue, whole blood, or the like. The apparatus generally includes a moveable piston positioned within a separation container...http://www.google.com.au/patents/US20070075016?utm_source=gb-gplus-sharePatent US20070075016 - Method and apparatus for collecting biological materials
