Protective device used for tracking a product, uses transformation of lot number based on maker's serial number to provide code that can be entered to handheld terminal which communicates with central computer

摘要

The product is marked with information on the part number, lot number, date, and an index and article code. In addition the mark contains a volatile code identifying the maker (IE) and a transformed lot number (NdLTcns) derived from the serial number (NS) issued by the maker. The code (4) can be entered (14) into a handheld terminal (1) which communicates with a central computer (3).