An apparatus for extracting and concentrating bioagents within a continuously flowing fluid medium includes a flow channel fluid inlet, in which bioagents are concentrated from three dimensions to a two-dimensional transport layer in a preconcentration area. Traveling wave grids cause the preconcentrated...http://www.google.com.au/patents/US7534336?utm_source=gb-gplus-sharePatent US7534336 - Continuous flow particle concentrator
