An osmotic delivery system having a space-efficient piston is provided. The enclosure has an interior holding the piston, a beneficial agent, and an osmopolymer including a tablet. The piston is movable with respect to an interior surface of the capsule, and defines a movable seal with the interior surface...http://www.google.fr/patents/US6997922?utm_source=gb-gplus-shareBrevet US6997922 - Osmotic delivery system having space efficient piston
Osmotic delivery system having space efficient piston
