Microneedle devices with microneedles having a truncated tapered shape are disclosed. The microneedles of microneedle devices may also have a controlled aspect ratio. Microneedle delivery apparatus are disclosed that include drivers designed to deliver microneedles at velocities that may enhance perforation...http://www.google.co.uk/patents/US20050261631?utm_source=gb-gplus-sharePatent US20050261631 - Microneedle devices and microneedle delivery apparatus
