An assay device for detecting the presence of analytes in an unknown sample including a reaction system wherein storage reservoirs containing reagent are fluidly connected to a track containing the sample. An actuation mechanism forces the reagent from the reservoirs and into the track where it mixes...http://www.google.com.au/patents/US5500187?utm_source=gb-gplus-sharePatent US5500187 - Disposable optical agglutination assay device and method for use
