A method of coding drug pills in which a machine readable code is placed on the outer surface of the drug pills. The code includes the name and dosage of the pill. The code is a linear bar code, a radial bar code, a code on the outer peripheral edge of a tablet, or a coaxial code extending ...http://www.google.co.uk/patents/US5700998?utm_source=gb-gplus-sharePatent US5700998 - Drug coding and delivery system
