A needleless syringe having a membrane (28) which is ruptured by gas pressure to generate a supersonic gas flow in which particles containing a therapeutic agent are injected....http://www.google.es/patents/US7942846?utm_source=gb-gplus-sharePatente US7942846 - Needleless syringe using supersonic gas flow for particle delivery
Needleless syringe using supersonic gas flow for particle delivery
