Drinks container deposit administration method in which a limited number of deposit code numbers are assigned to containers and then used to monitor collection and returning of deposits
DE10004113A1
Object authentication device has two regions on flexible sheet in which substances are provided which, when brought together, cause a color change or new color formation
DE19703637A1
authenticity testing system
DE19536461C1
Identification marking for use with such as travel tickets
DE4431748A1
Method of providing pre-prepared adhesive labels with printed markings on adhesive side
