A device is disclosed for conducting an assay. The device comprises a housing, means enclosed in the housing for capturing a first member of a specific binding pair (sbp) in a zone and for allowing liquid to be transported by capillary action away from the zone, first means in the housing for introducing...http://www.google.es/patents/US4981786?utm_source=gb-gplus-sharePatente US4981786 - Multiple port assay device
