WO/2004/084795 is referenced by 20 patents.
The invention relates to a marking of cartridges, carpules or any kind of package. The marking can be in an electronically readable form while be-ing transparent. Hereby a marking with improved security for avoiding reading errors which ensures a mandatory visual inspection of content is obtained. The transparent conductor can be in form of a polymer, an ITO and the like. These transparent conductors are used in an improved mark-ing technique, which further improves reading security. The invention may e.g. be used in connection with medication delivery devices for self-treatment of a disease, e.g. diabetes