A pipetting apparatus comprising a case and a receptacle formed therein, a pipette tip having a tube-like tip portion with a tip opening for fluid flow from the outside to the inside and vice versa and a deformable portion which is assembled with the tip portion to a unit, the pipette tip being placed...http://www.google.es/patents/US5406856?utm_source=gb-gplus-sharePatente US5406856 - Pipetting apparatus
