Packings in form of cards, folding boxes or suchlike has usage calendar with corresponding stampings, scoring or perforations with suitable print to make it known to consumer if product needs to be replaced

摘要

The packings in the form of cards, folding boxes or suchlike has an usage calendar with corresponding stampings, scoring or perforations with suitable print to make it known to the consumer if the product in use is time-expired or used up and needs to be replaced.