Microstructured taggant particles, their applications and methods of making the same are described. Precisely formed taggant particles can be formed, in the range of 500μ and smaller, from either inert polymers or biodegradable materials bearing information indicia, such as through specific shape, size,...http://www.google.es/patents/US20080130018?utm_source=gb-gplus-sharePatente US20080130018 - Microstructured Taggant Particles, Applications and Methods of Making the Same
Microstructured Taggant Particles, Applications and Methods of Making the Same
