In one embodiment, the present invention provides an improved liquid dispenser suitable for dispensing a small volume of liquid. The liquid dispenser has a capillary channel suitable for aspirating and retaining a predetermined and repeatable volume of liquid via capillary action. To dispense retained...http://www.google.es/patents/US6116297?utm_source=gb-gplus-sharePatente US6116297 - Article comprising a refillable capillary tube
