A delivery apparatus for selectively delivering one or more liquid reagents into a reaction or test chamber (2), especially of an assay apparatus, the apparatus comprising: one or more respective storage chambers (5,6) for containing the one or more liquid reagents and arranged generally above the reaction...http://www.google.com.au/patents/US20040209266?utm_source=gb-gplus-sharePatent US20040209266 - Reagent delivery system
